JP2013134461A - Process unit, developing device, process cartridge and image formation device - Google Patents

Process unit, developing device, process cartridge and image formation device Download PDF

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JP2013134461A
JP2013134461A JP2011286356A JP2011286356A JP2013134461A JP 2013134461 A JP2013134461 A JP 2013134461A JP 2011286356 A JP2011286356 A JP 2011286356A JP 2011286356 A JP2011286356 A JP 2011286356A JP 2013134461 A JP2013134461 A JP 2013134461A
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contact
photosensitive drum
phase
driving side
developing device
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JP2013134461A5 (en
JP5355679B2 (en
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Masaya Morioka
昌也 森岡
Kazuhiko Sugano
一彦 菅野
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Canon Inc
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Canon Inc
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Priority to JP2011286356A priority Critical patent/JP5355679B2/en
Priority to US13/713,117 priority patent/US9025998B2/en
Priority to CN201210579320.8A priority patent/CN103186089B/en
Publication of JP2013134461A publication Critical patent/JP2013134461A/en
Publication of JP2013134461A5 publication Critical patent/JP2013134461A5/en
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Publication of JP5355679B2 publication Critical patent/JP5355679B2/en
Priority to US14/689,431 priority patent/US9274499B2/en
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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
    • G03G21/1803Arrangements or disposition of the complete process cartridge or parts thereof
    • G03G21/1817Arrangements or disposition of the complete process cartridge or parts thereof having a submodular arrangement
    • G03G21/1821Arrangements or disposition of the complete process cartridge or parts thereof having a submodular arrangement means for connecting the different parts of the process cartridge, e.g. attachment, positioning of parts with each other, pressure/distance regulation
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
    • G03G21/1839Means for handling the process cartridge in the apparatus body
    • G03G21/1842Means for handling the process cartridge in the apparatus body for guiding and mounting the process cartridge, positioning, alignment, locks
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
    • G03G21/1803Arrangements or disposition of the complete process cartridge or parts thereof
    • G03G21/1817Arrangements or disposition of the complete process cartridge or parts thereof having a submodular arrangement
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
    • G03G21/1803Arrangements or disposition of the complete process cartridge or parts thereof
    • G03G21/1828Prevention of damage or soiling, e.g. mechanical abrasion
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
    • G03G21/1803Arrangements or disposition of the complete process cartridge or parts thereof
    • G03G21/1817Arrangements or disposition of the complete process cartridge or parts thereof having a submodular arrangement
    • G03G21/1825Pivotable subunit connection
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/16Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements
    • G03G21/18Mechanical means for facilitating the maintenance of the apparatus, e.g. modular arrangements using a processing cartridge, whereby the process cartridge comprises at least two image processing means in a single unit
    • G03G21/1839Means for handling the process cartridge in the apparatus body
    • G03G21/1842Means for handling the process cartridge in the apparatus body for guiding and mounting the process cartridge, positioning, alignment, locks
    • G03G21/1853Means for handling the process cartridge in the apparatus body for guiding and mounting the process cartridge, positioning, alignment, locks the process cartridge being mounted perpendicular to the axis of the photosensitive member

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  • Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrophotography Configuration And Component (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a process unit, a developing device, a process cartridge and an image formation device that can more securely keep a photoreceptor and processing means, until the start of their use, farther apart from each other than when they are in use.SOLUTION: A process unit 4 has processing means 41 and a supporting frame 46, and the processing means 41 can take a first position being used and a second position farther apart from the surface of a photoreceptor 1 than when in use. The process unit 4 comprises a regulating member 48, a supporting part 41a and a phase determining part 50L. The regulating member 48 has a support acceptor 48a, a contact part 48b and a part of phase determination 48c. Rotation of the photoreceptor 1 releases a contact state of the contacts part 48b with the photoreceptor 1 or an end member 1b against a force of the phase determining part 50L to determine a position of the regulating member 48 in the rotational direction, and the processing means 41 is thereby placed in the first position.

Description

本発明は、電子写真方式を用いた画像形成装置(電子写真画像形成装置)、並びに、これに用いられるプロセスユニット、現像装置及びプロセスカートリッジに関するものである。   The present invention relates to an image forming apparatus (electrophotographic image forming apparatus) using an electrophotographic system, and a process unit, a developing device, and a process cartridge used therefor.

ここで、電子写真画像形成装置とは、電子写真方式を用いて記録媒体に画像を形成する装置である。電子写真画像形成装置としては、複写機、プリンタ(レーザービームプリンタ、LEDプリンタなど)、ファクシミリ装置、ワードプロセッサなどが含まれる。   Here, the electrophotographic image forming apparatus is an apparatus that forms an image on a recording medium using an electrophotographic system. The electrophotographic image forming apparatus includes a copying machine, a printer (laser beam printer, LED printer, etc.), a facsimile machine, a word processor, and the like.

又、プロセスカートリッジとは、像担持体である電子写真感光体(感光体)と、この感光体に作用するプロセス手段の少なくとも一つと、を一体的にカートリッジ化し、このカートリッジを電子写真画像形成装置の本体に対して着脱可能としたものである。プロセス手段としては、帯電手段、現像手段、クリーニング手段などが含まれる。   The process cartridge is an electrophotographic photosensitive member (photosensitive member) that is an image bearing member and at least one of process means acting on the photosensitive member, and the cartridge is integrated into an electrophotographic image forming apparatus. It can be attached to and detached from the main body. Process means include charging means, developing means, cleaning means, and the like.

又、現像装置とは、感光体上の静電潜像を現像するために用いられる装置である。現像装置は、プロセスカートリッジの一部を構成したり、単独で電子写真画像形成装置の本体に対して着脱可能なカートリッジ(現像カートリッジ)を構成したりすることができる。   The developing device is a device used for developing an electrostatic latent image on a photoreceptor. The developing device can constitute a part of the process cartridge, or can independently constitute a cartridge (developing cartridge) that can be attached to and detached from the main body of the electrophotographic image forming apparatus.

又、プロセスユニットとは、感光体に接触又は近接して作用するプロセス手段であって、使用開始前の流通又は保管中などに使用中よりも感光体から離されるプロセス手段を有する画像形成装置における装置単位である。   In addition, the process unit is a process unit that operates in contact with or close to the photosensitive member, and is an image forming apparatus having a processing unit that is separated from the photosensitive member during use or distribution before use. It is a device unit.

従来、電子写真画像形成装置においては、プロセスカートリッジを電子写真画像形成装置の本体に着脱可能とするプロセスカートリッジ方式が広く採用されている。   2. Description of the Related Art Conventionally, in an electrophotographic image forming apparatus, a process cartridge system that allows a process cartridge to be attached to and detached from the main body of the electrophotographic image forming apparatus has been widely adopted.

例えば、このプロセスカートリッジに含まれるように構成された現像装置は、一般に、現像手段として感光体にトナーを供給するための回転可能な現像剤担持体を有する。そして、この現像剤担持体として、ゴムなどの弾性部材を用いて構成された現像ローラが用いられることがある。   For example, a developing device configured to be included in the process cartridge generally includes a rotatable developer carrying member for supplying toner to a photosensitive member as a developing unit. As the developer carrying member, a developing roller configured using an elastic member such as rubber may be used.

そして、例えばこの現像ローラに用いられるゴムなどの弾性部材は、製造後からユーザーが使用開始するまでの間に感光体に当接されたままにされると、変形したり、そこからしみ出した物質によって感光体に悪影響を及ぼしたりすることがある。   For example, an elastic member such as rubber used for the developing roller is deformed or oozes out if it is left in contact with the photosensitive member after the manufacture until the user starts using it. Substances may adversely affect the photoreceptor.

そこで、従来、現像ローラなど、感光体に作用するプロセス手段に使用する弾性部材の材料として、変形や劣化を起こしにくい材料を選ぶことが行われている。又、その他の対策として、プロセス手段に利用できる材料の選択肢を広げるなどために、プロセス手段と感光体とを離間した状態に維持して出荷する構成が提案されている(特許文献1)。   Therefore, conventionally, a material that is unlikely to be deformed or deteriorated has been selected as a material of an elastic member used for a process unit that acts on a photosensitive member such as a developing roller. As another countermeasure, there has been proposed a configuration in which the process means and the photosensitive member are maintained in a separated state in order to widen the choices of materials that can be used for the process means (Patent Document 1).

即ち、特許文献1の発明では、感光体を帯電するプロセス手段として導電性ゴムローラが用いられ、この導電性ゴムローラの支軸の端部にはワンエェイクラッチが取り付けられている。ワンウェイクラッチは、感光体ドラムの回転軸線方向の一側端のフランジに設けられたギアと噛み合うギアを有する。そして、両ギアが噛み合った状態で、感光体ドラムと導電性ゴムローラとが離間するように構成されている。感光体ドラムが正転することによりワンウェイクラッチがフリー方向に回動して、離間状態が解除される。又、ワンウェイクラッチは、引っ張りバネによってフリー方向に付勢されている。   That is, in the invention of Patent Document 1, a conductive rubber roller is used as a process means for charging the photosensitive member, and a one-ay clutch is attached to an end portion of a support shaft of the conductive rubber roller. The one-way clutch has a gear that meshes with a gear provided on a flange on one side end in the rotation axis direction of the photosensitive drum. The photosensitive drum and the conductive rubber roller are separated from each other with the two gears engaged with each other. When the photosensitive drum rotates normally, the one-way clutch rotates in the free direction, and the separated state is released. The one-way clutch is biased in the free direction by a tension spring.

特開平7−152224号公報JP-A-7-152224

しかしながら、従来提案されている、離間部材を用いてプロセス手段と感光体とを離間状態に維持して出荷する構成では、例えば物流又は保管中に強い振動を受けた際に、離間部材による離間状態が解除されてしまう可能性があった。   However, in the configuration in which the process member and the photosensitive member are maintained in the separated state using a separation member and shipped, the separation state caused by the separation member when subjected to strong vibration during distribution or storage, for example. Could be released.

例えば、特許文献1に記載の構成では、強い衝撃を受けて感光体ドラムと導電性ゴムローラとが離間する方向の力が働くと、両ギアの噛み合いが解除される可能性がある。またこれと共に、フリー方向に付勢されているワンウェイクラッチが回動して、感光体ドラムと導電性ゴムローラとの離間状態が解除されてしまう可能性がある。   For example, in the configuration described in Patent Document 1, if a force is applied in a direction in which the photosensitive drum and the conductive rubber roller are separated due to a strong impact, the engagement between the two gears may be released. At the same time, the one-way clutch biased in the free direction may rotate, and the separated state between the photosensitive drum and the conductive rubber roller may be released.

そのため、従来、物流又は保管中の振動を抑える梱包材にかかるコストが増大するなどの課題があった。   Therefore, conventionally, there has been a problem such as an increase in cost for a packaging material that suppresses vibration during distribution or storage.

尚、使用中に感光体に接触しないプロセス手段であっても、使用開始前の流通又は保管中などに不用意に感光体に接触することを防止するなどのために、これを使用中よりも感光体から離して出荷することが望まれることがある。この場合も、使用開始前にプロセス手段と感光体とがより離された状態が解除されないことが望まれる。   Even if the process means does not come into contact with the photoconductor during use, it is used more than in use in order to prevent inadvertent contact with the photoconductor during distribution or storage before use. It may be desirable to ship away from the photoreceptor. Also in this case, it is desirable that the state in which the process means and the photosensitive member are further separated before the start of use is not released.

従って、本発明の目的は、使用開始するまで、より確実に、感光体とプロセス手段とが使用中よりも離された状態を維持することのできるプロセスユニット、現像装置、プロセスカートリッジ及び画像形成装置を提供することである。   Accordingly, an object of the present invention is to provide a process unit, a developing device, a process cartridge, and an image forming apparatus capable of maintaining the state in which the photosensitive member and the process means are separated from each other more reliably during use until the start of use. Is to provide.

上記目的は本発明に係るプロセスユニット、現像装置、プロセスカートリッジ及び画像形成装置にて達成される。要約すれば、本発明は、回転可能な感光体に作用するプロセス手段と、前記プロセス手段を支持する支持枠体と、を有し、前記プロセス手段が、使用中の第1の位置と、使用中よりも前記感光体の表面から離された第2の位置と、をとり得るプロセスユニットにおいて、前記プロセス手段を前記第2の位置に維持し得る規制部材と、前記規制部材を回転可能に支持する支持部と、前記規制部材に作用して、前記規制部材の回転方向の位置を、前記規制部材が前記プロセス手段を前記第2の位置に維持し得る位置に決める位相決め部と、を有し、前記規制部材は、前記支持部によって回転可能に支持される支持受け部と、前記プロセス手段を前記第2の位置に維持する際に前記感光体又は前記感光体の回転軸線方向の端部に設けられた端部部材に当接する当接部と、前記位相決め部の作用を受ける被位相決め部と、を有し、前記感光体が回転することにより、前記位相決め部が前記規制部材の回転方向の位置を決める力に抗して、前記当接部の前記感光体又は前記端部部材への当接状態が解除されて、前記プロセス手段が前記第1の位置になることを特徴とするプロセスユニットである。   The above object is achieved by a process unit, a developing device, a process cartridge, and an image forming apparatus according to the present invention. In summary, the present invention comprises process means acting on a rotatable photoreceptor and a support frame that supports the process means, wherein the process means is in a first position in use and used. In a process unit capable of taking a second position farther away from the surface of the photoreceptor than inside, a regulating member capable of maintaining the process means in the second position, and the regulating member being rotatably supported And a phasing unit that acts on the regulating member to determine the position of the regulating member in the rotational direction so that the regulating member can maintain the process means at the second position. The restricting member includes a support receiving portion that is rotatably supported by the support portion, and an end portion of the photoconductor or the photoconductor in the rotation axis direction when the process means is maintained at the second position. End member provided on A force to determine the position of the regulating member in the rotational direction by rotating the photosensitive member. In contrast, the process unit is configured such that the contact state of the contact portion with the photosensitive member or the end member is released, and the process means is in the first position.

本発明の他の態様によると、上記本発明のプロセスユニットを有し、前記プロセス手段が感光体にトナーを供給する現像剤担持体である現像装置が提供される。   According to another aspect of the present invention, there is provided a developing device having the process unit of the present invention, wherein the process means is a developer carrying member for supplying toner to a photosensitive member.

又、本発明の他の態様によると、感光体と、上記本発明のプロセスユニットと、を有し、記録媒体に画像を形成して出力する画像形成装置の本体に対して着脱可能なプロセスカートリッジが提供される。   According to another aspect of the present invention, there is provided a process cartridge that includes a photoconductor and the process unit of the present invention, and is detachable from a main body of an image forming apparatus that forms and outputs an image on a recording medium. Is provided.

更に、本発明の他の態様によると、感光体と、上記本発明のプロセスユニットと、を有し、記録媒体に画像を形成して出力する画像形成装置が提供される。   Furthermore, according to another aspect of the present invention, there is provided an image forming apparatus that includes a photoconductor and the process unit of the present invention, and that forms and outputs an image on a recording medium.

本発明によれば、使用開始するまで、より確実に、感光体とプロセス手段とが使用中よりも離された状態を維持することができる。これによりプロセス手段の変形や感光体の傷つきなどを抑制し、画像形成装置によって良好な画像形成を行うことができる。   According to the present invention, it is possible to more reliably maintain the state where the photoconductor and the process means are separated from each other during use until the start of use. As a result, deformation of the process means and damage to the photoreceptor can be suppressed, and good image formation can be performed by the image forming apparatus.

本発明の一実施例に係る画像形成装置の概略断面図である。1 is a schematic cross-sectional view of an image forming apparatus according to an embodiment of the present invention. 本発明の一実施例に係るプロセスカートリッジの概略断面図である。It is a schematic sectional drawing of the process cartridge which concerns on one Example of this invention. 本発明の一実施例に係るプロセスカートリッジの外観斜視図である。1 is an external perspective view of a process cartridge according to an embodiment of the present invention. 本発明の一実施例に係る現像装置の組立斜視図である。1 is an assembled perspective view of a developing device according to an embodiment of the present invention. 本発明の一実施例に係るプロセスカートリッジの組立斜視図である。1 is an assembled perspective view of a process cartridge according to an embodiment of the present invention. 本発明の一実施例に係るプロセスカートリッジの組立斜視図である。1 is an assembled perspective view of a process cartridge according to an embodiment of the present invention. 本発明の一実施例に係るプロセスカートリッジの概略断面図である。It is a schematic sectional drawing of the process cartridge which concerns on one Example of this invention. 本発明の一実施例に係る現像装置の非駆動側端部近傍の組立斜視図である。FIG. 6 is an assembled perspective view of the vicinity of the non-driving side end of the developing device according to the embodiment of the present invention. 本発明の一実施例に係る現像装置の非駆動側端部近傍の概略断面図である。FIG. 3 is a schematic cross-sectional view of the vicinity of the non-driving side end of the developing device according to the embodiment of the present invention. 本発明の一実施例に係る離間部材の動作を説明するための現像装置の非駆動側端部近傍の概略断面図である。FIG. 6 is a schematic cross-sectional view of the vicinity of the non-driving side end of the developing device for explaining the operation of the separation member according to the embodiment of the present invention. 本発明の一実施例に係る離間部材の動作を説明するための現像装置の非駆動側端部近傍の概略断面図であるFIG. 6 is a schematic cross-sectional view of the vicinity of the non-driving side end of the developing device for explaining the operation of the separation member according to the embodiment of the present invention. 本発明の他の実施例に係る現像装置の非駆動側端部近傍の組立斜視図である。FIG. 10 is an assembled perspective view of the vicinity of a non-driving side end of a developing device according to another embodiment of the present invention. 本発明の他の実施例に係る離間部材の動作を説明するための現像装置の非駆動側端部近傍の概略断面図である。It is a schematic sectional drawing of the non-driving side edge part vicinity of the developing device for demonstrating operation | movement of the separation member which concerns on the other Example of this invention. 本発明の他の実施例に係る離間部材の動作を説明するための現像装置の非駆動側端部近傍の概略断面図である。It is a schematic sectional drawing of the non-driving side edge part vicinity of the developing device for demonstrating operation | movement of the separation member which concerns on the other Example of this invention. 本発明の更に他の実施例に係る離間部材の動作を説明するための現像装置の非駆動側端部近傍の概略断面図である。It is a schematic sectional drawing of the non-driving side edge part vicinity of the developing device for demonstrating operation | movement of the separation member which concerns on the further another Example of this invention. 本発明の更に他の実施例に係る離間部材の動作を説明するための現像装置の非駆動側端部近傍の組立斜視図である。FIG. 12 is an assembled perspective view of the vicinity of the non-driving side end portion of the developing device for explaining the operation of the separation member according to still another embodiment of the present invention. 本発明の更に他の実施例に係る離間部材の変形例を説明するための(a)現像装置の非駆動側端部近傍の組立斜視図、(b)離間部材の斜視図である。FIG. 10A is an assembled perspective view of the vicinity of a non-driving side end portion of the developing device, and FIG. 10B is a perspective view of the spacing member for explaining a modification of the spacing member according to still another embodiment of the present invention. 本発明の更に他の実施例に係る離間部材の動作を説明するための現像装置の非駆動側端部近傍の概略断面図である。It is a schematic sectional drawing of the non-driving side edge part vicinity of the developing device for demonstrating operation | movement of the separation member which concerns on the further another Example of this invention. 本発明の更に他の実施例に係る離間部材の動作を説明するための現像装置の非駆動側端部近傍の概略断面図である。It is a schematic sectional drawing of the non-driving side edge part vicinity of the developing device for demonstrating operation | movement of the separation member which concerns on the further another Example of this invention. 本発明の更に他の実施例に係る離間部材の動作を説明するための拡大断面図である。It is an expanded sectional view for demonstrating operation | movement of the separation member which concerns on the further another Example of this invention. 本発明の更に他の実施例に係る離間部材の支持方法を説明するための現像装置の非駆動側端部近傍の組立斜視図である。FIG. 10 is an assembled perspective view of the vicinity of a non-driving side end of a developing device for explaining a support method for a spacing member according to still another embodiment of the present invention. 本発明の更に他の実施例に係る現像装置の非駆動側端部近傍の組立斜視図である。FIG. 10 is an assembled perspective view of the vicinity of the non-driving side end portion of the developing device according to still another embodiment of the present invention. 本発明の更に他の実施例に係る離間部材の動作を説明するための現像装置の非駆動側端部近傍の概略断面図である。It is a schematic sectional drawing of the non-driving side edge part vicinity of the developing device for demonstrating operation | movement of the separation member which concerns on the further another Example of this invention. 本発明の更に他の実施例に係る現像装置の非駆動側端部近傍の組立斜視図である。FIG. 10 is an assembled perspective view of the vicinity of the non-driving side end portion of the developing device according to still another embodiment of the present invention. 本発明の更に他の実施例に係る離間部材の動作を説明するための現像装置の非駆動側端部近傍の概略断面図である。It is a schematic sectional drawing of the non-driving side edge part vicinity of the developing device for demonstrating operation | movement of the separation member which concerns on the further another Example of this invention. 本発明の更に他の実施例に係る離間部材の支持方法を説明するための離間部材の斜視図である。It is a perspective view of the separation member for demonstrating the support method of the separation member which concerns on the further another Example of this invention. 本発明の他の適用例を説明するための模式図である。It is a schematic diagram for demonstrating the other application example of this invention.

以下、本発明に係るプロセスユニット、現像装置、プロセスカートリッジ及び画像形成装置を図面に則して更に詳しく説明する。   Hereinafter, a process unit, a developing device, a process cartridge, and an image forming apparatus according to the present invention will be described in more detail with reference to the drawings.

実施例1
1.画像形成装置の全体構成及び動作
先ず、本発明の一実施例に係る画像形成装置の全体的な構成及び動作について説明する。図1は、本実施例の画像形成装置100の概略断面図である。
Example 1
1. First, the overall configuration and operation of an image forming apparatus according to an embodiment of the present invention will be described. FIG. 1 is a schematic cross-sectional view of an image forming apparatus 100 of the present embodiment.

本実施例の画像形成装置100は、電子写真プロセスを用いて紙などの記録媒体(記録材、転写材)Pにフルカラー画像の形成が可能なレーザービームプリンタである。   The image forming apparatus 100 of this embodiment is a laser beam printer that can form a full-color image on a recording medium (recording material, transfer material) P such as paper using an electrophotographic process.

本実施例の画像形成装置100は、複数の画像形成部として第1、第2、第3、第4の画像形成部(ステーション)SY、SM、SC、SKを有する。第1、第2、第3、第4の画像形成部SY、SM、SC、SKは、それぞれイエロー(Y)、マゼンタ(M)、シアン(C)、ブラック(K)の画像を形成する。   The image forming apparatus 100 according to the present exemplary embodiment includes first, second, third, and fourth image forming units (stations) SY, SM, SC, and SK as a plurality of image forming units. The first, second, third, and fourth image forming units SY, SM, SC, and SK form yellow (Y), magenta (M), cyan (C), and black (K) images, respectively.

本実施例では、第1、第2、第3、第4の画像形成部SY、SM、SC、SKの構成及び動作は、使用する現像剤としてのトナーの色が異なることを除いて実質的に同じである。従って、以下、特に区別を要しない場合は、いずれかの色用に設けられた要素であることを表す符号の添え字Y、M、C、Kは省略して、総括的に説明する。   In this embodiment, the configuration and operation of the first, second, third, and fourth image forming units SY, SM, SC, and SK are substantially the same except that the color of the toner as the developer to be used is different. Is the same. Therefore, in the following, when there is no particular need to distinguish, subscripts Y, M, C, and K indicating elements provided for any color will be omitted, and the description will be made comprehensively.

ここで、画像形成装置100に関して、図1中右側の装置開閉ドア13を設けた側を正面(前面)、正面とは反対側の面を背面(後面)とする。又、画像形成装置100を正面から見て右側を駆動側、左側を非駆動側とする。   Here, regarding the image forming apparatus 100, the side provided with the apparatus opening / closing door 13 on the right side in FIG. 1 is the front surface (front surface), and the surface opposite to the front surface is the back surface (rear surface). Further, when the image forming apparatus 100 is viewed from the front, the right side is the driving side and the left side is the non-driving side.

本実施例の画像形成装置100は、プロセスカートリッジ方式を採用しており、プロセスカートリッジ120を画像形成装置100の本体(装置本体)110に取り外し可能に装着することによって、記録媒体Pに画像を形成することができる。   The image forming apparatus 100 of this embodiment employs a process cartridge system, and an image is formed on the recording medium P by detachably attaching the process cartridge 120 to the main body (apparatus main body) 110 of the image forming apparatus 100. can do.

装置本体110内において、第1、第2、第3、第4のプロセスカートリッジ120Y、120M、120C、120Kは、略水平方向に配置されている。第1、第2、第3、第4のプロセスカートリッジ120Y、120M、120C、120Kは、それぞれ同様の電子写真プロセス機構を有しており、収容する現像剤としてのトナーの色が各々異なる。   In the apparatus main body 110, the first, second, third, and fourth process cartridges 120Y, 120M, 120C, and 120K are arranged in a substantially horizontal direction. Each of the first, second, third, and fourth process cartridges 120Y, 120M, 120C, and 120K has the same electrophotographic process mechanism, and the color of the toner as the developer stored therein is different.

プロセスカートリッジ120には、装置本体110の駆動出力部(図示せず)から回転駆動力が伝達される。又、プロセスカートリッジ120には、装置本体110のバイアス電源(図示せず)から、バイアス電圧(帯電バイアス、現像バイアスなど)が供給される。   A rotational driving force is transmitted to the process cartridge 120 from a drive output unit (not shown) of the apparatus main body 110. A bias voltage (charging bias, developing bias, etc.) is supplied to the process cartridge 120 from a bias power source (not shown) of the apparatus main body 110.

図2は、本実施例の画像形成装置100のプロセスカートリッジ120の概略断面図である。本実施例のプロセスカートリッジ120は、像担持体としてのドラム型の電子写真感光体(感光体)、即ち、感光体ドラム1と、この感光体ドラム1に作用するプロセス手段と、を有する。本実施例では、感光体ドラム1は、OPC(有機光導伝体)感光体層を有する有機感光体ドラムである。そして、本実施例では、プロセスカートリッジ120は、プロセス手段として、帯電手段、現像手段、クリーニング手段を有する。   FIG. 2 is a schematic cross-sectional view of the process cartridge 120 of the image forming apparatus 100 of the present embodiment. The process cartridge 120 of this embodiment includes a drum-type electrophotographic photosensitive member (photosensitive member) as an image carrier, that is, a photosensitive drum 1, and process means that acts on the photosensitive drum 1. In this embodiment, the photosensitive drum 1 is an organic photosensitive drum having an OPC (organic optical conductor) photosensitive layer. In this embodiment, the process cartridge 120 includes a charging unit, a developing unit, and a cleaning unit as process units.

本実施例では、プロセスカートリッジ120は、帯電手段としてローラ型の帯電部材である帯電ローラ5を有する。又、本実施例では、プロセスカートリッジ120は、クリーニング手段としてのクリーニングブレード61を備えたドラムクリーナ6を有する。又、本実施例では、プロセスカートリッジ120は、現像手段としてのローラ型の現像剤担持体である現像ローラ41を備えた現像装置4を有する。現像装置4は更に、現像剤供給部材としての供給ローラ42、現像剤規制部材としての現像ブレード43などを有する。プロセスカートリッジ120のより具体的な構成については後述する。   In this embodiment, the process cartridge 120 includes a charging roller 5 that is a roller-type charging member as a charging unit. In this embodiment, the process cartridge 120 has a drum cleaner 6 provided with a cleaning blade 61 as a cleaning means. In this embodiment, the process cartridge 120 includes a developing device 4 including a developing roller 41 that is a roller-type developer carrier as a developing unit. The developing device 4 further includes a supply roller 42 as a developer supply member, a development blade 43 as a developer regulating member, and the like. A more specific configuration of the process cartridge 120 will be described later.

第1のプロセスカートリッジ120Yは、現像枠体44内にイエロー(Y)のトナーを収容しており、感光体ドラム1の表面にイエロー色のトナー像を形成する。第2のプロセスカートリッジ120Mは、現像枠体44内にマゼンタ(M)のトナーを収容しており、感光体ドラム1の表面にマゼンタ色のトナー像を形成する。第3のプロセスカートリッジ120Cは、現像枠体44内にシアン(C)のトナーを収容しており、感光体ドラム1の表面にシアン色のトナー像を形成する。第4のプロセスカートリッジ120Kは、現像枠体44内にブラック(K)のトナーを収容しており、感光体ドラム1の表面にブラック色のトナー像を形成する。   The first process cartridge 120 </ b> Y contains yellow (Y) toner in the developing frame 44, and forms a yellow toner image on the surface of the photosensitive drum 1. The second process cartridge 120M contains magenta (M) toner in the developing device frame 44, and forms a magenta toner image on the surface of the photosensitive drum 1. The third process cartridge 120 </ b> C contains cyan (C) toner in the developing frame 44, and forms a cyan toner image on the surface of the photosensitive drum 1. The fourth process cartridge 120 </ b> K contains black (K) toner in the developing device frame 44 and forms a black toner image on the surface of the photosensitive drum 1.

装置本体110内において、第1、第2、第3、第4のプロセスカートリッジ120Y、120M、120C、120Kの上方には、露光手段としてのレーザースキャナユニット3が設けられている。このレーザースキャナユニット3は、画像情報に対応してレーザー光を出力する。そして、このレーザー光は、プロセスカートリッジ120の露光窓部123を通過して感光体ドラム1の表面を走査露光する。   In the apparatus main body 110, a laser scanner unit 3 as an exposure unit is provided above the first, second, third, and fourth process cartridges 120Y, 120M, 120C, and 120K. The laser scanner unit 3 outputs a laser beam corresponding to the image information. The laser light passes through the exposure window 123 of the process cartridge 120 and scans and exposes the surface of the photosensitive drum 1.

又、装置本体110内において、第1、第2、第3、第4のプロセスカートリッジ120Y、120M、120C、120Kと対向する位置(本実施例では各プロセスカートリッジ120の下方)には、中間転写ユニット7が設けられている。中間転写ユニット7は、中間転写体としての可撓性を有する無端ベルト状の中間転写ベルト71を有する。中間転写ベルト71は、複数の支持ローラとしての駆動ローラ72、ターンローラ73、テンションローラ74に掛け渡されている。プロセスカートリッジ120の感光体ドラム1は、中間転写ベルト71に当接させられる。その感光体ドラム1と中間転写ベルト71との接触部が1次転写部N1である。   In the apparatus main body 110, intermediate transfer is performed at positions facing the first, second, third, and fourth process cartridges 120Y, 120M, 120C, and 120K (below each process cartridge 120 in this embodiment). A unit 7 is provided. The intermediate transfer unit 7 has an endless belt-like intermediate transfer belt 71 having flexibility as an intermediate transfer member. The intermediate transfer belt 71 is stretched around a driving roller 72, a turn roller 73, and a tension roller 74 as a plurality of support rollers. The photosensitive drum 1 of the process cartridge 120 is brought into contact with the intermediate transfer belt 71. A contact portion between the photosensitive drum 1 and the intermediate transfer belt 71 is a primary transfer portion N1.

中間転写ベルト71の内周面側には、感光体ドラム1に対向させて1次転写手段としてのローラ型の転写部材である1次転写ローラ5が設けられている。1次転写ローラ5は、中間転写ベルト71を介して、感光体ドラム1に当接させられる。   A primary transfer roller 5, which is a roller-type transfer member serving as a primary transfer unit, is provided on the inner peripheral surface side of the intermediate transfer belt 71 so as to face the photosensitive drum 1. The primary transfer roller 5 is brought into contact with the photosensitive drum 1 via the intermediate transfer belt 71.

ターンローラ73には、中間転写ベルト71を介して、2次転写手段としてのローラ型の転写部材である2次転写ローラ8が当接させられる。中間転写ベルト71と2次転写ローラ8との接触部が2次転写部N2である。   A secondary transfer roller 8, which is a roller-type transfer member as a secondary transfer unit, is brought into contact with the turn roller 73 via an intermediate transfer belt 71. A contact portion between the intermediate transfer belt 71 and the secondary transfer roller 8 is a secondary transfer portion N2.

2次転写部N2よりも記録媒体Pの搬送方向の上流側(本実施例では中間転写ユニット7の下方)には、給送ユニット9が設けられている。給送ユニット9は、記録媒体Pを積載して収容した給紙トレイ91、給紙ローラ92などを有する。   A feeding unit 9 is provided upstream of the secondary transfer portion N2 in the conveyance direction of the recording medium P (in the present embodiment, below the intermediate transfer unit 7). The feeding unit 9 includes a paper feed tray 91 in which recording media P are stacked and stored, a paper feed roller 92, and the like.

又、2次転写部N2よりも記録媒体Pの搬送方向の下流側(本実施例では装置本体110内の背面側上方)には、定着手段としての定着ユニット10と、排出ユニット11とが設けられている。装置本体110の上面は、排出トレイ12とされている。   Also, a fixing unit 10 as a fixing unit and a discharge unit 11 are provided on the downstream side in the conveyance direction of the recording medium P from the secondary transfer portion N2 (in the present embodiment, on the back side in the apparatus main body 110). It has been. The upper surface of the apparatus main body 110 is a discharge tray 12.

2.画像形成動作
画像形成動作の一例として、フルカラー画像を形成する動作について説明する。
2. Image Forming Operation An operation for forming a full color image will be described as an example of the image forming operation.

各プロセスカートリッジ120の感光体ドラム1が、図中矢印R1方向に所定の速度(周速度)で回転駆動される。このとき、中間転写ベルト71も、1次転写部N1における表面の移動方向が感光体ドラム1と順方向となるように、図中矢印R2方向に感光体ドラム1の速度(周速度)に対応した速度(周速度)で回転駆動される。   The photosensitive drum 1 of each process cartridge 120 is rotationally driven at a predetermined speed (circumferential speed) in the direction of arrow R1 in the drawing. At this time, the intermediate transfer belt 71 also corresponds to the speed (circumferential speed) of the photosensitive drum 1 in the direction of the arrow R2 in the figure so that the moving direction of the surface in the primary transfer portion N1 is the forward direction with respect to the photosensitive drum 1. It is driven to rotate at the selected speed (circumferential speed).

次に、レーザースキャナユニット3が駆動される。レーザースキャナユニット3の駆動に同期して、各プロセスカートリッジ120において、帯電ローラ2が、感光体ドラム1の表面を所定の極性及び電位に一様に帯電させる。そして、レーザースキャナユニット3は、各感光体ドラム1の表面を各色の画像信号に応じてレーザー光で走査露光する。これにより、各感光体ドラム1の表面に対応する色の画像信号に応じた静電潜像(静電像)が形成される。   Next, the laser scanner unit 3 is driven. In synchronization with the driving of the laser scanner unit 3, the charging roller 2 uniformly charges the surface of the photosensitive drum 1 to a predetermined polarity and potential in each process cartridge 120. The laser scanner unit 3 scans and exposes the surface of each photosensitive drum 1 with laser light according to the image signal of each color. Thereby, an electrostatic latent image (electrostatic image) corresponding to the image signal of the color corresponding to the surface of each photosensitive drum 1 is formed.

各感光体ドラム1上に形成された静電潜像は、現像装置4の図中矢印R3方向に所定の速度(周速度)で回転駆動される現像ローラ41により、トナーが供給され、トナー像として現像される。   The electrostatic latent image formed on each photosensitive drum 1 is supplied with toner by a developing roller 41 that is driven to rotate at a predetermined speed (peripheral speed) in the direction of arrow R3 in the drawing of the developing device 4, and the toner image As developed.

上述のような電子写真画像形成プロセスにより、第1のプロセスカートリッジ120Yの感光体ドラム1には、フルカラー画像のイエロー成分に対応するイエロー色のトナー像が形成される。そして、そのトナー像が、1次転写ローラ5の作用により、中間転写ベルト71上に1次転写される。同様に第2のプロセスカートリッジ120Mの感光体ドラム1には、フルカラー画像のマゼンタ成分に対応するマゼンタ色トナー像が形成される。そして、そのトナー像が、中間転写ベルト71上に既に転写されているイエロー色のトナー像に重畳されて1次転写される。同様に第3のプロセスカートリッジ120Cの感光体ドラム1には、フルカラー画像のシアン成分に対応するシアン色トナー像が形成される。そして、そのトナー像が、中間転写ベルト71上に既に転写されているイエロー色、マゼンタ色のトナー像に重畳されて1次転写される。同様に第4のプロセスカートリッジ120Kの感光体ドラム1には、フルカラー画像のブラック成分に対応するブラック色トナー像が形成される。そして、そのトナー像が、中間転写ベルト71上に既に転写されているイエロー色、マゼンタ色、シアン色のトナー像に重畳されて1次転写される。   By the electrophotographic image forming process as described above, a yellow toner image corresponding to the yellow component of the full color image is formed on the photosensitive drum 1 of the first process cartridge 120Y. Then, the toner image is primarily transferred onto the intermediate transfer belt 71 by the action of the primary transfer roller 5. Similarly, a magenta toner image corresponding to the magenta component of the full-color image is formed on the photosensitive drum 1 of the second process cartridge 120M. The toner image is primary-transferred superimposed on the yellow toner image already transferred onto the intermediate transfer belt 71. Similarly, a cyan toner image corresponding to the cyan component of the full-color image is formed on the photosensitive drum 1 of the third process cartridge 120C. Then, the toner image is primary-transferred superimposed on the yellow and magenta toner images already transferred onto the intermediate transfer belt 71. Similarly, a black toner image corresponding to the black component of the full color image is formed on the photosensitive drum 1 of the fourth process cartridge 120K. The toner image is primary-transferred superimposed on the yellow, magenta, and cyan toner images already transferred onto the intermediate transfer belt 71.

このようにして、中間転写ベルト71上にイエロー色、マゼンタ色、シアン色、ブラック色の4色のトナー像によるフルカラー画像の未定着トナー像が形成される。   In this way, an unfixed toner image of a full color image is formed on the intermediate transfer belt 71 using four color toner images of yellow, magenta, cyan, and black.

一方、給送ユニット9において所定の制御タイミングで記録媒体Pが1枚ずつ分離されて給送される。その記録媒体Pは、所定の制御タイミングで、2次転写ローラ8と中間転写ベルト71との接触部である2次転写部N2に導入される。   On the other hand, in the feeding unit 9, the recording media P are separated and fed one by one at a predetermined control timing. The recording medium P is introduced into the secondary transfer portion N2 which is a contact portion between the secondary transfer roller 8 and the intermediate transfer belt 71 at a predetermined control timing.

これにより、記録媒体Pが2次転写部N2を搬送されていく過程で、中間転写ベルト71上の4色分が重畳されたトナー像が、記録媒体Pの面に順次に一括して2次転写される。   As a result, in the process in which the recording medium P is transported through the secondary transfer portion N2, the toner images on which the four colors on the intermediate transfer belt 71 are superimposed are sequentially collected on the surface of the recording medium P in a secondary manner. Transcribed.

その後、未定着トナー像を担持した記録媒体Pは、定着ユニット9へと搬送される。そして、記録媒体Pは、定着ユニット10によってトナー像が定着された後に、排出トレイ12へ排出される。   Thereafter, the recording medium P carrying the unfixed toner image is conveyed to the fixing unit 9. The recording medium P is discharged to the discharge tray 12 after the toner image is fixed by the fixing unit 10.

尚、1次転写工程後に感光体ドラム1上に残留したトナー(1次転写残トナー)は、ドラムクリーナ6によって感光体ドラム1上から除去されて回収される。又、2次転写工程後に中間転写ベルト71上に残留したトナー(2次転写残トナー)は、中間転写体クリーニング手段としてのベルトクリーナ(図示せず)によって中間転写ベルト71上から除去されて回収される。   The toner remaining on the photosensitive drum 1 after the primary transfer process (primary transfer residual toner) is removed from the photosensitive drum 1 by the drum cleaner 6 and collected. Further, the toner (secondary transfer residual toner) remaining on the intermediate transfer belt 71 after the secondary transfer process is removed from the intermediate transfer belt 71 by a belt cleaner (not shown) as an intermediate transfer body cleaning unit and collected. Is done.

3.プロセスカートリッジの構成
図3は、プロセスカートリッジ120の斜視図である。プロセスカートリッジ120は、感光体ドラム1の回転軸線方向を長手方向とする横長の形状である。プロセスカートリッジ120は、装置本体110に装着された状態で、長手方向の一方の端部が駆動側に配置され、他方の端部が非駆動側に配置される。
3. Configuration of Process Cartridge FIG. 3 is a perspective view of the process cartridge 120. The process cartridge 120 has a horizontally long shape in which the rotation axis direction of the photosensitive drum 1 is the longitudinal direction. In the state where the process cartridge 120 is mounted on the apparatus main body 110, one end in the longitudinal direction is disposed on the driving side, and the other end is disposed on the non-driving side.

プロセスカートリッジ120は、クリーニングユニット121と、現像ユニット122(現像装置4)と、駆動側カバー部材124と、非駆動側カバー部材125と、を有する。クリーニングユニット121と現像ユニット122とは互いに結合されている。   The process cartridge 120 includes a cleaning unit 121, a developing unit 122 (developing device 4), a driving side cover member 124, and a non-driving side cover member 125. The cleaning unit 121 and the developing unit 122 are coupled to each other.

クリーニングユニット121は、感光体ドラム1と、帯電ローラ2と、ドラムクリーナ6と、を有する。ドラムクリーナ6は、クリーニングブレード61を有する。感光体ドラム1、帯電ローラ2及びクリーニングブレード61は、廃トナー収容部62aを形成する枠体としてのクリーニング容器(クリーニング枠体)62に取り付けられている。   The cleaning unit 121 includes the photosensitive drum 1, the charging roller 2, and the drum cleaner 6. The drum cleaner 6 has a cleaning blade 61. The photosensitive drum 1, the charging roller 2, and the cleaning blade 61 are attached to a cleaning container (cleaning frame) 62 as a frame that forms the waste toner container 62a.

帯電ローラ2は、感光体ドラム1の表面に接触し、感光体ドラム1の回転に従動して回転する。そして、帯電ローラ2は、帯電バイアスの供給を受けて、感光体ドラム1の表面を帯電させる。   The charging roller 2 is in contact with the surface of the photosensitive drum 1 and rotates following the rotation of the photosensitive drum 1. The charging roller 2 is charged with the charging bias and charges the surface of the photosensitive drum 1.

クリーニングブレード61は、クリーニング容器62に固定されている。クリーニングブレード61は、その先端(短手方向の自由端)の弾性ゴム部が、感光体ドラム1の回転方向に対してカウンター方向に当接させられている。クリーニングブレード61は、画像形成時には、回転する感光体ドラム1上に残留した転写残トナーを掻き取って、感光体ドラム1の表面をクリーニングする。クリーニングブレード61の先端は、転写残トナーをより確実に掻き取るために、感光体ドラム1の表面に対して所定の圧力をもって当接させられている。   The cleaning blade 61 is fixed to the cleaning container 62. The cleaning rubber 61 has an elastic rubber portion at the tip (free end in the short direction) abutted in the counter direction with respect to the rotation direction of the photosensitive drum 1. The cleaning blade 61 cleans the surface of the photosensitive drum 1 by scraping off the transfer residual toner remaining on the rotating photosensitive drum 1 during image formation. The tip of the cleaning blade 61 is brought into contact with the surface of the photosensitive drum 1 with a predetermined pressure in order to scrape the transfer residual toner more reliably.

又、クリーニングブレード61によって感光体ドラム1の表面から掻き取られた転写残トナーは、廃トナーとしてクリーニング容器62の内部に形成された廃トナー収容部62aに収容される。   Further, the transfer residual toner scraped off from the surface of the photosensitive drum 1 by the cleaning blade 61 is stored as a waste toner in a waste toner storage portion 62 a formed inside the cleaning container 62.

4.現像装置の構成
図4は、現像装置4の組立斜視図である。現像ユニット122(現像装置4)は、現像剤担持体としての現像ローラ41の回転軸線方向を長手方向とする横長の形状である。現像装置4は、装置本体110内に配置された状態で、長手方向の一方の端部が駆動側に配置され、他方の端部が非駆動側に配置される。
4). Configuration of Developing Device FIG. 4 is an assembled perspective view of the developing device 4. The developing unit 122 (developing device 4) has a horizontally long shape in which the rotation axis direction of the developing roller 41 as a developer carrier is a longitudinal direction. In the state where the developing device 4 is disposed in the apparatus main body 110, one end portion in the longitudinal direction is disposed on the driving side, and the other end portion is disposed on the non-driving side.

現像ローラ41及び供給ローラ42は、トナー収容部44aを形成する枠体としての現像枠体44に取り付けられている。現像ローラ41の回転軸(芯材)41aの両端部は、それぞれ現像枠体44の駆動側端部、非駆動側端部に取り付けられた支持枠体としての駆動側軸受部材45、非駆動側軸受部材46によって回転自在に支持されている。同様に、供給ローラ42の回転軸(芯材)42aの両端部は、それぞれ駆動側軸受部材45、非駆動側軸受部材46によって回転自在に支持されている。駆動側軸受部材45、非駆動側軸受部材46は、それぞれ現像枠体44に一体的に固定されている。   The developing roller 41 and the supply roller 42 are attached to a developing frame 44 as a frame that forms the toner accommodating portion 44a. Both end portions of the rotation shaft (core material) 41a of the developing roller 41 are a driving side bearing member 45 as a supporting frame body attached to a driving side end portion and a non-driving side end portion of the developing frame 44, and a non-driving side, respectively. The bearing member 46 is rotatably supported. Similarly, both end portions of the rotation shaft (core material) 42a of the supply roller 42 are rotatably supported by a driving side bearing member 45 and a non-driving side bearing member 46, respectively. The driving side bearing member 45 and the non-driving side bearing member 46 are each integrally fixed to the developing device frame 44.

本実施例では、現像ローラ41は、ステンレスなどの金属からなる芯材(芯金)41aの周りに、適度な導電性を持たせた弾性層41bが形成されて構成されている。弾性層41bは、ゴム材料で形成されている。ゴム材料としては、シリコンゴム、ウレタンゴム、アクリルゴム、天然ゴム、EPDM(エチレンプロピレンジエンゴム)などを用いることができる。弾性層41bの電気抵抗値は、カーボンやカーボン樹脂粒子、金属粒子、イオン導電剤などを分散させることで調整することができる。   In the present embodiment, the developing roller 41 is configured by forming an elastic layer 41b having appropriate conductivity around a core material (core metal) 41a made of metal such as stainless steel. The elastic layer 41b is made of a rubber material. As the rubber material, silicon rubber, urethane rubber, acrylic rubber, natural rubber, EPDM (ethylene propylene diene rubber), or the like can be used. The electric resistance value of the elastic layer 41b can be adjusted by dispersing carbon, carbon resin particles, metal particles, an ionic conductive agent, or the like.

又、現像装置4の長手方向の駆動側軸受部材45よりも外側において、現像ローラ41の芯材41aの駆動側端部には、現像ローラギア41cが取り付けられている。同様に、現像装置4の長手方向の駆動側軸受部材45よりも外側において、供給ローラ42の芯材42aの駆動側端部には、供給ローラギア42bが取り付けられている。そして、これら現像ローラギア41c、供給ローラギア42bは、駆動側軸受部材45により回転自在に支持された現像駆動入力ギア47と噛み合っている。   A developing roller gear 41 c is attached to the driving side end of the core material 41 a of the developing roller 41 outside the driving side bearing member 45 in the longitudinal direction of the developing device 4. Similarly, a supply roller gear 42 b is attached to the drive side end of the core member 42 a of the supply roller 42 outside the drive side bearing member 45 in the longitudinal direction of the developing device 4. The developing roller gear 41 c and the supply roller gear 42 b mesh with a developing drive input gear 47 that is rotatably supported by the drive side bearing member 45.

現像駆動入力ギア47は、駆動入力カップリング47aを備えている。この駆動入力カップリング47aが、装置本体110側の駆動出力カップリング(図示せず)と係合して、装置本体110の駆動モータ(図示せず)の駆動力が現像駆動入力ギア47に伝達される。これにより、現像ローラギア41c、供給ローラギア42bを介して、現像ローラ41と供給ローラ42が所定の速度で回転駆動される。現像ローラ41は、図中矢印R3方向に回転駆動され、供給ローラ42は、図中矢印R4方向に回転駆動される。現像ローラ41と供給ローラ42とは接触させられており、その接触部で互いの表面の移動方向は逆方向である。   The development drive input gear 47 includes a drive input coupling 47a. The drive input coupling 47 a engages with a drive output coupling (not shown) on the apparatus main body 110 side, and the driving force of a drive motor (not shown) of the apparatus main body 110 is transmitted to the development drive input gear 47. Is done. As a result, the developing roller 41 and the supply roller 42 are rotationally driven at a predetermined speed via the developing roller gear 41c and the supply roller gear 42b. The developing roller 41 is rotationally driven in the direction of arrow R3 in the figure, and the supply roller 42 is rotationally driven in the direction of arrow R4 in the figure. The developing roller 41 and the supply roller 42 are in contact with each other, and the moving directions of the surfaces of the developing roller 41 and the supply roller 42 are opposite to each other.

現像ローラ41の芯材41aの非駆動側の端部には、感光体とプロセス手段とを使用中よりも離された状態にする規制部材としての離間部材48が取り付けられている。離間部材48は、芯材41aによって回転可能に支持されている。そして、その離間部材48よりも現像装置4の長手方向の外側から、非駆動側軸受部材46が取り付けられている。離間部材48の詳細については後述する。   At the end of the developing roller 41 on the non-driving side of the core material 41a, a separating member 48 is attached as a regulating member that keeps the photosensitive member and the process means separated from those in use. The spacing member 48 is rotatably supported by the core member 41a. A non-driving side bearing member 46 is attached from the outside in the longitudinal direction of the developing device 4 relative to the separation member 48. Details of the separation member 48 will be described later.

現像ブレード43は、厚み0.1mm程度の弾性を有する金属薄板である。現像ブレード43の先端(短手方向の自由端)は、現像ローラ41の回転方向に対してカウンター方向に当接させられている。   The developing blade 43 is a thin metal plate having elasticity with a thickness of about 0.1 mm. The tip of the developing blade 43 (the free end in the short direction) is in contact with the rotation direction of the developing roller 41 in the counter direction.

又、現像装置4の長手方向の駆動側の端部において、供給ローラ42の芯材42aの現像枠体44の外側に露出した部分に、シール部材である駆動側供給ローラ軸シール(以下「駆動側シール」という。)50Rが装着されている。又、現像装置4の長手方向の非駆動側の端部において、供給ローラ42の芯材42aの現像枠体44の外側に露出した部分に、シール部材である非駆動側供給ローラ軸シール(以下「非駆動側シール」という。)50Lが装着されている。これにより、現像枠体44に設けられた貫通穴44b(図8)と芯材42aとの隙間からのトナー漏れが防止されている。   Further, at the end of the developing device 4 on the driving side in the longitudinal direction, a portion of the core member 42a of the supply roller 42 exposed to the outside of the developing frame 44 is a driving side supply roller shaft seal (hereinafter referred to as “drive”). 50R "is attached. Further, at the end of the developing device 4 on the non-driving side in the longitudinal direction, a non-driving side supply roller shaft seal (hereinafter referred to as a seal member) is formed on a portion of the core member 42a of the supply roller 42 exposed to the outside of the developing frame 44. 50L is attached. As a result, toner leakage from the gap between the through hole 44b (FIG. 8) provided in the developing frame 44 and the core member 42a is prevented.

現像装置4は、揺動中心B1(図7)を中心に、現像ローラ41が感光体ドラム1に接触する方向(図7中の矢印A1方向)に、付勢手段としての加圧バネ55(図9、図11)によって常に付勢されている。この加圧バネ55は、クリーニング容器62と現像枠体44との間に配置されており、クリーニング容器62に対して現像枠体44を回動させる。この加圧バネ55の付勢力により、現像ローラ41は感光体ドラム1に当接させられる。   The developing device 4 has a pressure spring 55 (as an urging unit) in a direction (in the direction of arrow A1 in FIG. 7) in which the developing roller 41 contacts the photosensitive drum 1 around the swing center B1 (FIG. 7). 9 and FIG. 11) are always energized. The pressurizing spring 55 is disposed between the cleaning container 62 and the developing device frame 44, and rotates the developing device frame 44 with respect to the cleaning container 62. The developing roller 41 is brought into contact with the photosensitive drum 1 by the biasing force of the pressure spring 55.

画像形成時には、前述のようにして現像ローラ41と供給ローラ42とが駆動されることで、供給ローラ42と現像ローラ41とが回転しながら摺擦する。これにより、現像枠体44内のトナーが現像ローラ41上に担持される。   At the time of image formation, the developing roller 41 and the supply roller 42 are driven as described above, so that the supply roller 42 and the developing roller 41 are rubbed while rotating. As a result, the toner in the developing frame 44 is carried on the developing roller 41.

現像ブレード43は、現像ローラ41の周面に形成されるトナー層の厚みを規制すると共に、その現像ローラ41に対する当接圧により、現像ローラ41との間で摩擦帯電による電荷をトナーに付与する。   The developing blade 43 regulates the thickness of the toner layer formed on the peripheral surface of the developing roller 41, and applies a charge due to frictional charging between the developing roller 41 and the toner by the contact pressure against the developing roller 41. .

そして、現像ローラ41と感光体ドラム1との接触部Dで、現像ローラ41上の電荷を帯びたトナーが、感光体ドラム1上の静電潜像に付着する。これにより、感光体ドラム1上の静電潜像がトナー像として現像される。   The charged toner on the developing roller 41 adheres to the electrostatic latent image on the photosensitive drum 1 at the contact portion D between the developing roller 41 and the photosensitive drum 1. As a result, the electrostatic latent image on the photosensitive drum 1 is developed as a toner image.

5.クリーニングユニットと現像装置の結合方法
図5及び図6は、クリーニングユニット121と現像ユニット122(現像装置4)との結合方法を示す組立斜視図である。図5は、プロセスカートリッジ120の長手方向の駆動側からの視点で表した斜視図であり、図6は、プロセスカートリッジ120の長手方向の非駆動側からの視点で表した斜視図である。
5. FIG. 5 and FIG. 6 are assembly perspective views showing a method of connecting the cleaning unit 121 and the developing unit 122 (developing device 4). FIG. 5 is a perspective view of the process cartridge 120 viewed from the longitudinal driving side, and FIG. 6 is a perspective view of the process cartridge 120 viewed from the longitudinal non-driving side.

感光体ドラム1の長手方向における駆動側の端部には、駆動側端部部材1aが取り付けられている。この駆動側端部部材1aには、駆動入力カップリング1a1と軸部1a2とが設けられている。駆動入力カップリング1a1は、装置本体110側の駆動出力カップリング(図示せず)と係合して、装置本体110の駆動モータ(図示せず)の駆動力を受け取る。又、感光体ドラム1の長手方向における非駆動側の端部には、非駆動側端部部材1bが取り付けられている。この非駆動側端部部材1bには、軸部1b1が設けられている。   A driving side end member 1 a is attached to the driving side end in the longitudinal direction of the photosensitive drum 1. The drive side end member 1a is provided with a drive input coupling 1a1 and a shaft 1a2. The drive input coupling 1a1 is engaged with a drive output coupling (not shown) on the apparatus main body 110 side to receive a driving force of a drive motor (not shown) of the apparatus main body 110. A non-driving side end member 1b is attached to the non-driving side end of the photosensitive drum 1 in the longitudinal direction. The non-driving side end member 1b is provided with a shaft portion 1b1.

駆動側カバー部材124は、駆動側感光体ドラム軸受部124bによって、駆動側端部部材1aの軸部1a1を回転可能に支持する。非駆動側カバー部材125は、非駆動側感光体ドラム軸受部125bによって、非駆動側端部部材1bの軸部1b1を回転可能に支持する。そして、駆動側カバー部材124と非駆動側カバー部材125は、クリーニング容器62に固定される。   The driving side cover member 124 rotatably supports the shaft portion 1a1 of the driving side end member 1a by the driving side photosensitive drum bearing portion 124b. The non-driving side cover member 125 rotatably supports the shaft portion 1b1 of the non-driving side end member 1b by the non-driving side photosensitive drum bearing portion 125b. The driving side cover member 124 and the non-driving side cover member 125 are fixed to the cleaning container 62.

現像装置4の長手方向の駆動側の端部には、現像枠体44に一体的に固定された、ギア保持部材49が設けられている。このギア保持部材49は、現像ローラ41及び供給ローラ42の支持枠体としての駆動側軸受部材45と共に、現像枠体44に一体的に固定されている。又、現像装置4の長手方向の非駆動側の端部には、現像ローラ41及び供給ローラ42の支持枠体としての非駆動側軸受部材46が、現像枠体44に一体的に固定されている。   At the end of the developing device 4 on the drive side in the longitudinal direction, a gear holding member 49 that is integrally fixed to the developing device frame 44 is provided. The gear holding member 49 is integrally fixed to the developing frame 44 together with a driving side bearing member 45 as a supporting frame for the developing roller 41 and the supply roller 42. Further, a non-driving side bearing member 46 as a supporting frame body for the developing roller 41 and the supply roller 42 is integrally fixed to the developing frame body 44 at the end portion on the non-driving side in the longitudinal direction of the developing device 4. Yes.

ギア保持部材49は、装置本体110から現像装置4への駆動力を受け取る駆動入力カップリング47aを備えた現像駆動入力ギア47を、駆動側軸受部材45と共に回転可能に支持している(図5)。ギア保持部材49の、現像装置4の長手方向における外側の側面には、円筒状の揺動支持軸49aが設けられている。この揺動支持軸49aが、駆動側カバー部材124の揺動支持穴124aに嵌合することで、ギア保持部材49が駆動側カバー部材124によって回転可能に支持される。   The gear holding member 49 rotatably supports the development drive input gear 47 having a drive input coupling 47a that receives a drive force from the apparatus main body 110 to the developing device 4 together with the drive side bearing member 45 (FIG. 5). ). A cylindrical rocking support shaft 49 a is provided on the outer side surface of the gear holding member 49 in the longitudinal direction of the developing device 4. The gear support member 49 is rotatably supported by the drive side cover member 124 by fitting the swing support shaft 49 a into the swing support hole 124 a of the drive side cover member 124.

非駆動側軸受部材46の、現像装置4の長手方向における外側の側面には、揺動支持穴46aが設けられている。この揺動支持穴46aに、非駆動側カバー部材125の揺動支持軸125aが嵌合することで、非駆動側軸受部材46が非駆動側カバー部材125によって回転可能に支持される。   A swing support hole 46 a is provided on the outer side surface of the non-drive side bearing member 46 in the longitudinal direction of the developing device 4. By fitting the swing support shaft 125a of the non-drive side cover member 125 into the swing support hole 46a, the non-drive side bearing member 46 is rotatably supported by the non-drive side cover member 125.

このように、現像装置4は、駆動側カバー部材124と非駆動側カバー部材125とによって揺動可能に支持されている。現像ローラ41と感光体ドラム1との距離は、現像装置4の揺動によって変えることができる。   As described above, the developing device 4 is supported by the driving-side cover member 124 and the non-driving-side cover member 125 so as to be swingable. The distance between the developing roller 41 and the photosensitive drum 1 can be changed by swinging the developing device 4.

図7は、詳しくは後述する離間部材48によって、現像装置4が揺動中心B1を支点として図中矢印A2方向に回転させられて、現像ローラ41と感光体ドラム1とが離間された状態を示している。   FIG. 7 shows a state in which the developing device 4 is rotated in the direction of the arrow A2 in the drawing by the separation member 48 described later in detail with the swing center B1 as a fulcrum so that the developing roller 41 and the photosensitive drum 1 are separated from each other. Show.

6.離間部材の構成
次に、離間部材48の構成について詳細に説明する。
6). Next, the configuration of the separation member 48 will be described in detail.

図8は、現像装置4の長手方向における非駆動側の端部を示した組立斜視図である。   FIG. 8 is an assembled perspective view showing an end portion on the non-driving side in the longitudinal direction of the developing device 4.

現像枠体44の非駆動側の端面44aに開けられた貫通穴44bから供給ローラ42の芯材42aが露出している。この露出した芯材42aに、非駆動側シール50Lが取り付けられている。非駆動側シール50Lは、現像装置4の長手方向に所定の厚さを有する円環状部材とされている。本実施例では、非駆動側シール50Lは、スポンジで形成されている。   The core member 42a of the supply roller 42 is exposed from the through hole 44b formed in the end surface 44a on the non-driving side of the developing device frame 44. A non-driving side seal 50L is attached to the exposed core member 42a. The non-driving side seal 50 </ b> L is an annular member having a predetermined thickness in the longitudinal direction of the developing device 4. In the present embodiment, the non-driving side seal 50L is formed of a sponge.

非駆動側シール50Lは、供給ローラ42の芯材42aにその内径部50L1を嵌合させて、該供給ローラ42の芯材42aに取り付けられる。そして、非駆動側軸受部材46が現像枠体44に取り付けられると、供給ローラ42の芯材42aが非駆動側軸受部材46の供給ローラ支持穴46cに嵌合することで、供給ローラ42は非駆動側軸受部材46によって回転可能に支持される。このとき、非駆動側軸受部材46の供給ローラ支持穴46cの周辺に設けられた突起46dが、非駆動側シール50Lを現像枠体44側へ押し付ける。こうして非駆動側シール50Lが現像装置4の長手方向に圧縮されることで、現像枠体44の内部からのトナーの漏れ出しが防止される。   The non-driving side seal 50L is attached to the core material 42a of the supply roller 42 by fitting the inner diameter portion 50L1 of the core material 42a of the supply roller 42. When the non-driving side bearing member 46 is attached to the developing frame 44, the core member 42a of the supply roller 42 is fitted into the supply roller support hole 46c of the non-driving side bearing member 46, so that the supply roller 42 is non- The drive side bearing member 46 is rotatably supported. At this time, the protrusion 46d provided around the supply roller support hole 46c of the non-driving side bearing member 46 presses the non-driving side seal 50L toward the developing device frame 44 side. In this way, the non-driving side seal 50L is compressed in the longitudinal direction of the developing device 4, so that leakage of toner from the inside of the developing device frame 44 is prevented.

尚、本実施例では、駆動側供給ローラ軸シール50Rとしても、非駆動側供給ローラ軸シール50Lと同様のものが用いられている。   In this embodiment, the drive side supply roller shaft seal 50R is the same as the non-drive side supply roller shaft seal 50L.

現像枠体44の非駆動側の端面44aよりも外側に突出した現像ローラ41の芯材41aに、離間部材48が取り付けられている。離間部材48は、支持受け部としての円環状部48aを有する。又、離間部材48は、円環状部48aからその半径方向外側に突出した当接部48bを有する。又、離間部材48は、円環状部48aからその半径方向外側に突出した被位相決め部48cを有する。この被位相決め部48cは、離間部材48の回転方向の位置を決める、即ち、位相を決める際に、後述する位相決め部が作用する部分である。本実施例では、円環状部48a、当接部48b、被位相決め部48cは、現像装置4の長手方向において同一の所定の厚さを有し、該長手方向の両側面は面一とされている。又、円環状部48aの回転軸線(回転中心)に対して、当接部48bと被位相決め部48cとは、略対象の位置に設けられている。本実施例では、円環状部48aの回転軸線は、現像ローラ41の回転軸線(回転中心)と同じである。   A spacing member 48 is attached to the core material 41 a of the developing roller 41 that protrudes outward from the end surface 44 a on the non-driving side of the developing frame 44. The spacing member 48 has an annular portion 48a as a support receiving portion. The spacing member 48 has an abutting portion 48b that protrudes radially outward from the annular portion 48a. The spacing member 48 has a phased portion 48c that protrudes radially outward from the annular portion 48a. The phase determining portion 48c is a portion where a phase determining portion described later acts when determining the position of the separating member 48 in the rotational direction, that is, when determining the phase. In this embodiment, the annular portion 48a, the contact portion 48b, and the phased portion 48c have the same predetermined thickness in the longitudinal direction of the developing device 4, and both side surfaces in the longitudinal direction are flush with each other. ing. Further, the abutting portion 48b and the phase-determining portion 48c are provided at substantially target positions with respect to the rotation axis (rotation center) of the annular portion 48a. In this embodiment, the rotation axis of the annular portion 48 a is the same as the rotation axis (rotation center) of the developing roller 41.

離間部材48は、現像ローラ41の芯材41aが円環状部48aの内径部48a1に嵌合することで、該現像ローラ41の芯材41aによって回転可能に支持される。そして、非駆動側軸受部材46が現像枠体44に取り付けられると、現像ローラ41の芯材41aが非駆動側軸受部材46の現像ローラ支持穴46bに嵌合することで、現像ローラ41は非駆動側軸受部材46によって回転可能に支持される。このとき、離間部材48は、非駆動側軸受46が、現像装置4の長手方向の外側に取り付けられるので、現像ローラ41の芯材41aから脱落することはない。   The spacing member 48 is rotatably supported by the core material 41a of the developing roller 41 by fitting the core material 41a of the developing roller 41 to the inner diameter portion 48a1 of the annular portion 48a. When the non-driving side bearing member 46 is attached to the developing frame 44, the core material 41a of the developing roller 41 is fitted into the developing roller support hole 46b of the non-driving side bearing member 46, so that the developing roller 41 is non- The drive side bearing member 46 is rotatably supported. At this time, the non-driving side bearing 46 is attached to the outer side in the longitudinal direction of the developing device 4 so that the separation member 48 does not fall off the core material 41 a of the developing roller 41.

本実施例では、非駆動側シール50Lが、離間部材48の回転方向の位置を決める、即ち、位相を決める位相決め部としての機能を有する。詳しくは後述するように、非駆動側軸受部材46を現像枠体44に取り付けたときに、非駆動側シール50Lの一部は、離間部材48の被位相決め部48cの現像枠体44側の側面によって、現像枠体44側へ押し付けられる。換言すれば、離間部材48の被位相決め部48cが、圧縮された非駆動側シール50Lの弾性反発力により、非駆動側軸受部材46側に押し付けられることで、離間部材48の位相決めがなされる。非駆動側軸受部材46の供給ローラ支持穴46cの周囲における、離間部材48の被位相決め部48cが配置される位置に対応する部分には、突起46dは設けられていない。   In the present embodiment, the non-driving side seal 50L has a function as a phase determining unit that determines the position of the separating member 48 in the rotational direction, that is, determines the phase. As will be described in detail later, when the non-driving side bearing member 46 is attached to the developing device frame 44, a part of the non-driving side seal 50L is located on the developing device frame 44 side of the phased portion 48c of the separating member 48. It is pressed toward the developing device frame 44 by the side surface. In other words, the phased portion 48c of the separating member 48 is pressed against the non-driving side bearing member 46 side by the elastic repulsive force of the compressed non-driving side seal 50L, so that the phase of the separating member 48 is determined. The The protrusion 46d is not provided in the portion corresponding to the position where the phased portion 48c of the separation member 48 is disposed around the supply roller support hole 46c of the non-drive side bearing member 46.

本実施例では、非駆動側シール50Lと被位相決め部48cとによって、現像ローラ41と感光体ドラム1とを離間させる位相に離間部材48を位相決めする位相決め手段が構成される。   In the present embodiment, the non-driving side seal 50L and the phase-determining portion 48c constitute phase determining means for determining the phase of the separating member 48 to a phase for separating the developing roller 41 and the photosensitive drum 1.

次に、図9を参照して離間部材48と非駆動側シール50Lとの位置関係について説明する。図9は、現像装置4の側面図である。図9では、非駆動側カバー部材125、非駆動側軸受部材46、感光体ドラム1の非駆動側端部部材1bは省略した。   Next, the positional relationship between the separation member 48 and the non-driving side seal 50L will be described with reference to FIG. FIG. 9 is a side view of the developing device 4. In FIG. 9, the non-driving side cover member 125, the non-driving side bearing member 46, and the non-driving side end member 1b of the photosensitive drum 1 are omitted.

離間部材48は、現像ローラ41の芯材41aを支点にして回転可能に該芯材41aに支持されている。しかし、離間部材48の被位相決め部48cは、離間部材48が所定の位相にあるときに、現像装置4の長手方向において非駆動側シール50Lと重なり合うように設けられている。そのため、離間部材48は、所定の位相にあるときに、被位相決め部48cに加えられる非駆動側シール50Lからの弾性力で位相決めされ、自由に回転することはできない。   The separation member 48 is supported by the core member 41a so as to be rotatable about the core member 41a of the developing roller 41 as a fulcrum. However, the phased portion 48c of the separating member 48 is provided so as to overlap the non-driving side seal 50L in the longitudinal direction of the developing device 4 when the separating member 48 is in a predetermined phase. Therefore, the separation member 48 is phase-determined by the elastic force from the non-driving side seal 50L applied to the phase-determining portion 48c when in the predetermined phase, and cannot be freely rotated.

ここで、離間部材48を現像装置4に取り付けた後、且つ、現像装置4の使用開始前の離間部材48の所定の位相は、感光体ドラム1と当接する当接部48bの中心軸線が、感光体ドラム1の回転軸線(回転中心)B2の方向を向く位相である。離間部材48をこの位相としてプロセスカートリッジ120を組み立てると、離間部材48の当接部48bの当接面48b1が感光体ドラム1と当接して、現像ローラ41と感光体ドラム1とが離間した状態を維持することができる。   Here, after the separation member 48 is attached to the developing device 4 and before the start of use of the developing device 4, the predetermined phase of the separation member 48 is such that the central axis of the contact portion 48 b that contacts the photosensitive drum 1 is The phase is directed in the direction of the rotation axis (rotation center) B2 of the photosensitive drum 1. When the process cartridge 120 is assembled with the separation member 48 as this phase, the contact surface 48b1 of the contact portion 48b of the separation member 48 contacts the photosensitive drum 1, and the developing roller 41 and the photosensitive drum 1 are separated from each other. Can be maintained.

本実施例では、当接部48bは、円環状部48aから感光体ドラム1に向けて直線状に延長された角柱形状に形成されている。又、本実施例では、被位相決め部48cは、円環状部48aから非駆動側シール50Lに向けて延長された、円環状部48aの半径方向外側が広がった扇形状に形成されている。   In the present embodiment, the contact portion 48 b is formed in a prismatic shape that extends linearly from the annular portion 48 a toward the photosensitive drum 1. Further, in the present embodiment, the phase-determined portion 48c is formed in a fan shape extending from the annular portion 48a toward the non-driving side seal 50L and spreading outward in the radial direction of the annular portion 48a.

7.離間部材の解除動作
図10は、離間部材48が現像ローラ41を感光体ドラム1から離間させている状態から、離間部材48による離間状態が解除されて現像ローラ41と感光体ドラム1とが当接した状態になるまでの動作を説明するための側面図である。図10では、非駆動側カバー部材125、非駆動側軸受部材46、感光体ドラム1の非駆動側端部部材1bは省略した。
7). FIG. 10 shows a state in which the separation member 48 is released from the state in which the separation member 48 separates the developing roller 41 from the photosensitive drum 1, and the separation state by the separation member 48 is released. It is a side view for demonstrating operation | movement until it will be in the state which contact | connected. In FIG. 10, the non-driving side cover member 125, the non-driving side bearing member 46, and the non-driving side end member 1b of the photosensitive drum 1 are omitted.

図10(a)は、プロセスカートリッジ120の製造後からユーザーがプロセスカートリッジ120を使用開始するまでの物流又は保管中の状態を示している。   FIG. 10A shows a state of physical distribution or storage after the process cartridge 120 is manufactured until the user starts using the process cartridge 120.

この状態では、離間部材48は、当接部48bの当接面48b1が感光体ドラム1と当接する位相にある。これにより、現像ローラ41は、感光体ドラム1から距離G1だけ離間させられている。このとき、離間部材48は、被位相決め部48cが非駆動側シール50Lから受ける弾性力により位相決めされている。   In this state, the separation member 48 is in a phase where the contact surface 48b1 of the contact portion 48b contacts the photosensitive drum 1. Thus, the developing roller 41 is separated from the photosensitive drum 1 by a distance G1. At this time, the separation member 48 is phased by the elastic force that the phased portion 48c receives from the non-driving side seal 50L.

前述のように、現像装置4は、加圧バネ(図示せず)によって、揺動中心B1を中心として現像ローラ41が感光体ドラム1に当接する方向に回動するように、常に付勢されている。離間部材48は、この加圧バネによる付勢力や物流又は保管中における衝撃力に耐えられる強度に設定する必要がある。   As described above, the developing device 4 is always urged by a pressure spring (not shown) so that the developing roller 41 rotates in the direction in which the developing roller 41 abuts on the photosensitive drum 1 around the swing center B1. ing. The spacing member 48 needs to be set to a strength that can withstand the urging force of the pressure spring and the impact force during physical distribution or storage.

ここで、離間部材48の当接部48bが、上記付勢力や衝撃力に抗する際に曲げモーメントを受ける形状の場合、曲げを受ける根元部分には大きな応力が掛かる。   Here, when the contact portion 48b of the separating member 48 has a shape that receives a bending moment when resisting the urging force or impact force, a large stress is applied to the base portion that receives the bending.

これに対し、本実施例では、当接部48bは、現像ローラ41の芯材41aと感光体ドラム1とに挟まれた位置にある。これによって、離間部材48に加わる力は、現像ローラ41の回転軸線B3と感光体ドラム1の回転軸線B2との間に延びた当接部48bに対する図中矢印F1方向の圧縮の力のみとなる。従って、離間部材48は、この圧縮の力に耐えることができればよいので、その形状や材質はこの圧縮の力潰されない形状や材質であればよく、比較的小さな部品でも現像ローラ41を感光体ドラム1から離間させることができる。   On the other hand, in the present embodiment, the contact portion 48 b is located between the core material 41 a of the developing roller 41 and the photosensitive drum 1. As a result, the force applied to the separating member 48 is only the compression force in the direction of the arrow F1 in the figure against the contact portion 48b extending between the rotation axis B3 of the developing roller 41 and the rotation axis B2 of the photosensitive drum 1. . Therefore, the spacing member 48 only needs to be able to withstand this compression force, and the shape and material thereof may be any shape or material that does not collapse this compression force. 1 can be separated.

図10(b)は、ユーザーがプロセスカートリッジ120の使用を開始した時の状態を示している。   FIG. 10B shows a state when the user starts using the process cartridge 120.

ユーザーがプロセスカートリッジ120の使用を開始すると、感光体ドラム1は装置本体110の駆動源(図示せず)からの駆動力を受けて図中矢印R1方向に回転する。離間部材48は、当接部48bと感光体ドラム1との摩擦力を受けて、図中矢印A3で示すように、感光体ドラム1との当接位置で当接部48bが感光体ドラム1に対して順方向に移動する方向に回転し始める。この回転方向が離間部材48の順回転方向である。   When the user starts using the process cartridge 120, the photosensitive drum 1 receives a driving force from a driving source (not shown) of the apparatus main body 110 and rotates in the direction of arrow R1 in the drawing. The spacing member 48 receives the frictional force between the contact portion 48b and the photosensitive drum 1, and the contact portion 48b is located at the contact position with the photosensitive drum 1 as indicated by an arrow A3 in the figure. It starts to rotate in the direction of moving forward. This rotation direction is the forward rotation direction of the separating member 48.

上述のように、離間部材48は、被位相決め部48cが非駆動側シール50Lから受ける弾性力により位相決めされている。この離間部材48を位相決めする力F2は、非駆動側シール50Lの弾性力によって生じる摩擦力である。これに対して、感光体ドラム1から受ける離間部材48を回転させる回転力F3は、上記位相決めする力F2よりも大きく設定されている。即ち、次の力関係になるように、離間部材48の形状や材質が決められている。
離間部材48を位相決めする力F2<離間部材48を回転させる力F3
As described above, the spacing member 48 is phased by the elastic force that the phased portion 48c receives from the non-driving side seal 50L. The force F2 for phasing the separating member 48 is a frictional force generated by the elastic force of the non-driving side seal 50L. On the other hand, the rotational force F3 for rotating the separating member 48 received from the photosensitive drum 1 is set to be larger than the phase determining force F2. That is, the shape and material of the separating member 48 are determined so as to satisfy the following force relationship.
Force F2 for phasing the spacing member 48 <force F3 for rotating the spacing member 48

従って、離間部材48は、感光体ドラム1との接触部Dから受ける回転力F3によって更に回転を続ける。   Accordingly, the separation member 48 continues to rotate further due to the rotational force F3 received from the contact portion D with the photosensitive drum 1.

このとき、現像装置4は、前述のように揺動可能に支持されているため、揺動中心B1を支点として図中矢印A1方向に回転する。これに伴い、現像ローラ41と感光体ドラム1との距離G2は徐々に小さくなる。   At this time, since the developing device 4 is supported so as to be able to swing as described above, the developing device 4 rotates in the direction of the arrow A1 in the drawing with the swing center B1 as a fulcrum. Along with this, the distance G2 between the developing roller 41 and the photosensitive drum 1 gradually decreases.

尚、非駆動側軸受部材46の供給ローラ支持穴46cの周囲に設けられた突起46dは、離間部材48の被位相決め部48cの移動を許すような形状に切り欠かれている。   A protrusion 46d provided around the supply roller support hole 46c of the non-driving side bearing member 46 is cut out in a shape that allows the phased portion 48c of the separation member 48 to move.

図10(c)は、離間部材48の回転が終了し、現像ローラ41と感光体ドラム1とが接触部Dで接触している状態を示している。   FIG. 10C shows a state in which the rotation of the separating member 48 is finished and the developing roller 41 and the photosensitive drum 1 are in contact with each other at the contact portion D.

離間部材48の当接部48bが感光体ドラム1に接触しなくなる位置まで回転すると、離間部材48は、現像ローラ41の芯材41aの回転に伴う摩擦力を受けて、順回転方向(図中矢印A3方向)に更に回転する。本実施例では、離間部材48は、感光体ドラム1と離間部材48の当接部48bとの最近接部が距離G3だけ離れる位置まで回転する。   When the contact member 48b of the separation member 48 is rotated to a position where it does not come into contact with the photosensitive drum 1, the separation member 48 receives a frictional force accompanying the rotation of the core member 41a of the developing roller 41, and the forward rotation direction (in the drawing). Further rotation in the direction of arrow A3). In this embodiment, the separation member 48 rotates to a position where the closest part between the photosensitive drum 1 and the contact portion 48b of the separation member 48 is separated by a distance G3.

本実施例では、離間部材48の感光体ドラム1への当接状態が解除された後の回転が滑らかに行われるように、離間部材48の被位相決め部48cは切り欠かれている。即ち、離間部材48の当接部48bが感光体ドラム1から距離G3だけ離れた際に、被位相決め部48cと非駆動側シール50Lとの最近接部に隙間G5ができるように、被位相決め部48cの形状が決められている。又、この隙間G5は、離間部材48が図中矢印A4で示す逆回転方向に回転したとしても、離間部材48の当接部48bが感光体ドラム1に接触しない程度まで小さく設定されている。即ち、この状態で、非駆動側シール50Lは、被位相決め部48による圧縮力が解除され、その弾性復元力によりほぼ自然状態に復帰しており、被位相決め部48cが逆回転方向(図中矢印A4方向)に回転する際の障害となる。   In this embodiment, the phased portion 48c of the spacing member 48 is cut out so that the rotation after the spacing member 48 is released from the contact state with the photosensitive drum 1 is smoothly performed. That is, when the abutting portion 48b of the separating member 48 is separated from the photosensitive drum 1 by the distance G3, a gap G5 is formed at the closest portion between the phase-determining portion 48c and the non-driving side seal 50L. The shape of the determining portion 48c is determined. Further, the gap G5 is set so small that the contact portion 48b of the separation member 48 does not contact the photosensitive drum 1 even if the separation member 48 rotates in the reverse rotation direction indicated by the arrow A4 in the drawing. That is, in this state, the non-driving side seal 50L is released from the compressive force by the phase-determining portion 48 and is almost restored to its natural state by the elastic restoring force, and the phase-determining portion 48c is in the reverse rotation direction (see FIG. It becomes an obstacle when rotating in the middle arrow A4 direction.

又、現像枠体44には、離間部材48が順回転方向(図中矢印A3方向)に回転し過ぎないように、順回転規制部44cが設けられている。これにより、離間部材48は、順回転規制部44cと接触したところで、順回転方向への回転が規制される。   Further, the developing device frame 44 is provided with a forward rotation restricting portion 44c so that the separating member 48 does not rotate too much in the forward rotation direction (the direction of arrow A3 in the figure). Thereby, when the separation member 48 comes into contact with the forward rotation restricting portion 44c, the rotation in the forward rotation direction is restricted.

8.物流又は保管中の振動に対する位相決め
図11は、プロセスカートリッジ120が物流又は保管中に大きな衝撃を受けた際の離間部材48の状態を説明するための側面図である。図11では、非駆動側カバー部材125、非駆動側軸受部材46、感光体ドラム1の非駆動側端部部材1bは省略した。
8). FIG. 11 is a side view for explaining the state of the separation member 48 when the process cartridge 120 receives a large impact during distribution or storage. In FIG. 11, the non-driving side cover member 125, the non-driving side bearing member 46, and the non-driving side end member 1b of the photosensitive drum 1 are omitted.

現像装置4は、前述のように揺動可能に支持されている。そのため、プロセスカートリッジ120が衝撃を受けた際に、現像装置4を感光体ドラム1へ付勢する加圧バネの力に抗して現像装置4が感光体ドラム1から離れる方向、即ち、図中矢印A2方向へ回転することもある。このとき、離間部材48の当接部48bは、感光体ドラム1から離れてしまう。   The developing device 4 is supported so as to be swingable as described above. Therefore, when the process cartridge 120 receives an impact, the developing device 4 moves away from the photosensitive drum 1 against the force of the pressure spring that urges the developing device 4 toward the photosensitive drum 1, that is, in the drawing. It may rotate in the direction of arrow A2. At this time, the contact portion 48 b of the separation member 48 is separated from the photosensitive drum 1.

しかし、本実施例によれば、このような状態となっても、被位相決め部48cが非駆動側シール50Lからの摩擦力を受けて、離間部材48の位相が維持される。そのため、衝撃が収まった時に、離間部材48の当接部48bが感光体ドラム1と接触する。つまり、離間部材48による現像ローラ41と感光体ドラム1との離間状態は維持される。   However, according to the present embodiment, even in such a state, the phase determining portion 48c receives the frictional force from the non-driving side seal 50L, and the phase of the separating member 48 is maintained. Therefore, when the impact is stopped, the contact portion 48 b of the separation member 48 comes into contact with the photosensitive drum 1. That is, the separation state between the developing roller 41 and the photosensitive drum 1 by the separation member 48 is maintained.

このように、本実施例によれば、プロセスユニットとしての現像装置4は、回転可能な感光体1に作用するプロセス手段としての現像ローラ41と、現像ローラ41を支持する支持枠体としての非駆動側軸受部材46と、を有する。現像装置4では、現像ローラ41が、使用中の第1の位置(図2)と、使用中よりも感光体1の表面から離された第2の位置(図7)と、をとり得る。そして、現像装置4は、現像ローラ41を第2の位置に維持し得る規制部材としての離間部材48と、離間部材48を回転可能に支持する支持部としての現像ローラ41の芯材41aと、を有する。又、現像装置4は、離間部材48に作用して、離間部材48の回転方向の位置を、離間部材48が現像ローラ41を第2の位置に維持し得る位置に決める位相決め部としての非駆動側シール50Lと、を有する。離間部材48は、支持部41aによって回転可能に支持される支持受け部としての円環状部48aを有する。又、離間部材48は、現像ローラ41を第2の位置に維持する際に感光体1又は感光体1の回転軸線方向の端部に設けられた端部部材1bに当接する当接部48bを有する。又、離間部材48は、位相決め部50Lの作用を受ける被位相決め部48cを有する。そして、感光体1が回転することにより、位相決め部50Lが離間部材48の回転方向の位置を決める力に抗して、当接部48bの感光体1又は端部部材1bへの当接状態が解除されて、現像ローラ41が第1の位置になる。又、本実施例では、当接部48bは、感光体1の回転軸線と、離間部材48の回転軸線との間にある。又、本実施例では、現像装置4は更に、上記当接状態が解除された後に、上記当接状態が解除される際の方向に離間部材48が回転することを規制する順回転規制部44cを有する。   As described above, according to this embodiment, the developing device 4 as a process unit includes a developing roller 41 as a process unit that acts on the rotatable photosensitive member 1 and a non-supporting frame body that supports the developing roller 41. Drive side bearing member 46. In the developing device 4, the developing roller 41 can take a first position in use (FIG. 2) and a second position (FIG. 7) farther from the surface of the photoreceptor 1 than in use. The developing device 4 includes a separating member 48 as a regulating member that can maintain the developing roller 41 in the second position, a core member 41a of the developing roller 41 as a support portion that rotatably supports the separating member 48, Have Further, the developing device 4 acts on the separating member 48 to determine the position of the separating member 48 in the rotational direction as a phase determining unit that determines the position at which the separating member 48 can maintain the developing roller 41 at the second position. Drive side seal 50L. The separation member 48 has an annular portion 48a as a support receiving portion that is rotatably supported by the support portion 41a. The separation member 48 has a contact portion 48b that contacts the end member 1b provided at the end of the photosensitive member 1 or the rotational axis direction of the photosensitive member 1 when the developing roller 41 is maintained at the second position. Have. Further, the separation member 48 has a phase-determined portion 48c that receives the action of the phase determining portion 50L. Then, when the photosensitive member 1 rotates, the phase determining portion 50L is in contact with the photosensitive member 1 or the end member 1b against the force that determines the position of the separating member 48 in the rotational direction. Is released, and the developing roller 41 is in the first position. In this embodiment, the contact portion 48 b is between the rotation axis of the photosensitive member 1 and the rotation axis of the separating member 48. In this embodiment, the developing device 4 further includes a forward rotation restricting portion 44c that restricts the rotation of the separating member 48 in the direction in which the contact state is released after the contact state is released. Have

以上説明したように、現像ローラ41を離間させる離間部材48は、現像ローラ41の芯材41aと感光体ドラム1との間に挟み込まれて配置される。従って、離間部材48の形状や材質は、圧縮に対して耐えられる程度の形状や材質であれよく、部品の小型化が容易である。又、離間部材48が小型化され軽量化されることにより、物流又は保管中に受ける振動、即ち、加速度から生まれる力が小さくて済む。そのため、離間部材48の位相決めのための力(本実施例では非駆動側シール50Lの弾性力)を大きくしなくても、容易に物流又は保管中の離間部材48の位相決めを行うことができる。   As described above, the separating member 48 that separates the developing roller 41 is disposed between the core material 41 a of the developing roller 41 and the photosensitive drum 1. Therefore, the shape and material of the separation member 48 may be a shape and material that can withstand compression, and the size of the component can be easily reduced. Further, since the spacing member 48 is reduced in size and weight, the vibration received during distribution or storage, that is, the force generated from the acceleration can be reduced. Therefore, the phase of the separating member 48 during distribution or storage can be easily determined without increasing the force for determining the phase of the separating member 48 (in this embodiment, the elastic force of the non-driving side seal 50L). it can.

例えば、本実施例の離間部材48を樹脂(ポリアセタール)で作製して、現像装置4に取り付けた実験では、現像装置4への衝撃を250G(重力加速度)で行っても、離間部材48が位相決めされた状態を維持することができた。   For example, in an experiment in which the separation member 48 of the present embodiment is made of resin (polyacetal) and attached to the developing device 4, the separation member 48 is in phase even if the impact on the developing device 4 is performed at 250 G (gravity acceleration). We were able to maintain the determined state.

又、感光体ドラム1との接触により生じる摩擦力で離間部材48を回転させることで、現像ローラ41と感光体ドラム1との離間状態を解除することができる。即ち、ユーザーによるプロセスカートリッジ120の使用開始に伴って、自動的に離間部材48による現像ローラ41と感光体ドラム1との離間状態を解除することができる。そのため、ユーザーに離間部材48を解除させる作業を無くして、ユーザービリティを向上させることができる。   Further, the separation member 48 is rotated by the frictional force generated by the contact with the photosensitive drum 1, thereby releasing the separation state between the developing roller 41 and the photosensitive drum 1. That is, the separation state between the developing roller 41 and the photosensitive drum 1 by the separation member 48 can be automatically released with the start of use of the process cartridge 120 by the user. Therefore, it is possible to improve usability by eliminating the work of releasing the separation member 48 by the user.

即ち、本実施例によれば、使用開始前の物流又は保管中などにプロセス手段を感光体からより離された位置にする構成において、使用開始するまで、より確実に、プロセス手段が感光体からより離された状態を維持することができる。これにより、プロセス手段が感光体に当接したままとされること、或いは不用意に感光体に接触することなどによる画像不良の可能性をより小さくすることができる。つまり、プロセス手段の変形や感光体の傷つきなどを抑制し、画像形成装置によって良好な画像形成を行うことができる。   That is, according to the present embodiment, in a configuration in which the process means is separated from the photoconductor during distribution or storage before the start of use, the process means is more reliably removed from the photoconductor until the start of use. A more separated state can be maintained. As a result, it is possible to further reduce the possibility of image defects caused by the process means being kept in contact with the photosensitive member or inadvertently contacting the photosensitive member. That is, it is possible to suppress the deformation of the process means and the damage of the photosensitive member, and to perform good image formation by the image forming apparatus.

実施例2
次に、本発明の他の実施例について説明する。本実施例の現像装置、プロセスカートリッジ及び画像形成装置の基本的な構成及び動作は、実施例1のものと同じである。従って、実施例1の画像形成装置のものと同一又はそれに相当する機能、構成を有する要素には同一符号を付して、詳しい説明は省略する。
Example 2
Next, another embodiment of the present invention will be described. The basic configuration and operation of the developing device, process cartridge, and image forming apparatus of the present embodiment are the same as those of the first embodiment. Accordingly, elements having the same or corresponding functions and configurations as those of the image forming apparatus according to the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

本実施例では、離間部材48が弾性変形可能な被位相決め部を有し、非駆動側軸受部材46がこの被位相決め部に作用する位相決め部を有する。   In the present embodiment, the separating member 48 has a phase-determined portion that can be elastically deformed, and the non-driving side bearing member 46 has a phase-determining portion that acts on the phase-determined portion.

図12は、現像装置4の非駆動側を表す組立斜視図である。図13及び図14は、図12中の矢印Vで示すように現像枠体44の内部から非駆動側軸受部材46の方向に見た、現像ローラ41及び供給ローラ42の非駆動側端部近傍の断面図である。   FIG. 12 is an assembled perspective view showing the non-driving side of the developing device 4. 13 and 14 show the vicinity of the non-driving side end portions of the developing roller 41 and the supply roller 42 as viewed from the inside of the developing frame 44 toward the non-driving side bearing member 46 as indicated by an arrow V in FIG. FIG.

図12に示すように、離間部材48が現像ローラ41の芯材41aに取り付けられた後、非駆動側軸受部材46が現像枠体44に取り付けられる。   As shown in FIG. 12, after the separation member 48 is attached to the core member 41 a of the developing roller 41, the non-driving side bearing member 46 is attached to the developing device frame 44.

本実施例では、離間部材48は、実施例1のものと同様の円環状部48a及び当接部48bを有する。そして、本実施例では、離間部材48は、弾性変形可能な被位相決め部48cを有する。この被位相決め部48cは、基部48c1と、弾性変形部としてのアーム部48c2と、係止部としての凸形状部48c3と、を有する。本実施例では、円環状部48aの回転軸線に対して、当接部48bと被位相決め部48cの凸形状部48c3とは、略対象の位置に設けられている。本実施例では、円環状部48aの回転軸線は、現像ローラ41の回転軸線と同じである。被位相決め部48cの基部48c1は、離間部材48の順回転方向(図中矢印A3方向)において凸形状部よりも下流側で、円環状部48aからその半径方向外側に突出している。この基部48c1から、円環状部48aの外周に沿って延長されるように、アーム部48c2が形成されている。そして、このアーム部48c2の自由端近傍に、凸形状部48c3が、円環状部48aの半径方向外側に突出して設けられている。アーム部48c2は、凸形状部48c3を円環状部48aの半径方向内側に移動させるように撓ませることができる。   In the present embodiment, the separation member 48 has an annular portion 48a and a contact portion 48b similar to those of the first embodiment. In this embodiment, the separation member 48 has a phase determining portion 48c that can be elastically deformed. This phased portion 48c has a base portion 48c1, an arm portion 48c2 as an elastic deformation portion, and a convex portion 48c3 as a locking portion. In the present embodiment, the abutting portion 48b and the convex portion 48c3 of the phase-determining portion 48c are provided at substantially target positions with respect to the rotation axis of the annular portion 48a. In this embodiment, the rotation axis of the annular portion 48 a is the same as the rotation axis of the developing roller 41. The base portion 48c1 of the phased portion 48c protrudes radially outward from the annular portion 48a on the downstream side of the convex portion in the forward rotation direction of the separating member 48 (in the direction of arrow A3 in the figure). An arm portion 48c2 is formed so as to extend from the base portion 48c1 along the outer periphery of the annular portion 48a. A convex portion 48c3 is provided in the vicinity of the free end of the arm portion 48c2 so as to protrude outward in the radial direction of the annular portion 48a. The arm part 48c2 can be bent so that the convex part 48c3 is moved inward in the radial direction of the annular part 48a.

本実施例では、実施例1とは異なり、非駆動側シール50Lは、位相決め部としての機能を有しておらず、離間部材48の被位相決め部48cとは接触しない大きさとされている。   In the present embodiment, unlike the first embodiment, the non-driving side seal 50L does not have a function as a phasing portion and is sized so as not to contact the phasing portion 48c of the separation member 48. .

非駆動側軸受部材46には、当接部48bが感光体ドラム1に当接する位相にある離間部材48の被位相決め部48cの凸形状部48c3と対向する位置に、位相決め部46dが設けられている。   The non-driving side bearing member 46 is provided with a phase determining portion 46d at a position facing the convex portion 48c3 of the phase-determined portion 48c of the separating member 48 in a phase where the contact portion 48b contacts the photosensitive drum 1. It has been.

本実施例では、離間部材48の凸形状部48c3を、非駆動側軸受部材46の位相決め部46dで抱え込むことで、離間部材48の位相を決める。   In this embodiment, the phase of the separation member 48 is determined by holding the convex portion 48 c 3 of the separation member 48 by the phase determination portion 46 d of the non-drive side bearing member 46.

凸形状部48c3は、アーム部48c2が図中矢印A5で示すように円環状部48aに向かう方向へ撓められることにより、位相決め部46dに係合させられる。   The convex portion 48c3 is engaged with the phase determining portion 46d when the arm portion 48c2 is bent in the direction toward the annular portion 48a as indicated by an arrow A5 in the drawing.

位相決め部46dは、離間部材48の回転方向における凸形状部48c3の頂部48c4の接線方向に対して傾斜した斜面46d1を有する。この斜面46d1は、離間部材48の順回転方向(図中矢印A3方向)の下流に向かうに従って、離間部材48の円環状部48aの回転軸線に近づく向きに傾斜している。本実施例では、この斜面46d1は、凸形状部48c3における離間部材48の順回転方向(図中矢印A3方向)の下流側の面である下流側面48c5と接触する。   The phase determining portion 46d has a slope 46d1 that is inclined with respect to the tangential direction of the top 48c4 of the convex portion 48c3 in the rotation direction of the separating member 48. The inclined surface 46d1 is inclined so as to approach the rotation axis of the annular portion 48a of the separating member 48 as it goes downstream in the forward rotation direction (the direction of arrow A3 in the figure) of the separating member 48. In the present embodiment, the inclined surface 46d1 is in contact with the downstream side surface 48c5, which is the downstream surface of the separating member 48 in the convex portion 48c3 in the forward rotation direction (the arrow A3 direction in the figure).

又、位相決め部46dは、離間部材48が逆回転方向(図中矢印A4方向)に回転した際に、被位相決め部48cと接触する逆回転規制部46d2を有する。本実施例では、この逆回転規制部46d2は、凸形状部48c3における離間部材48の順回転方向(図中矢印A3方向)の上流側の面である上流側面48c6、及びアーム部48c2の自由端側の端面48c7と接触する。   The phase determining portion 46d has a reverse rotation restricting portion 46d2 that comes into contact with the phase-determined portion 48c when the separating member 48 rotates in the reverse rotation direction (the direction of arrow A4 in the figure). In the present embodiment, the reverse rotation restricting portion 46d2 includes an upstream side surface 48c6 that is an upstream surface in the forward rotation direction (in the direction of arrow A3 in the figure) of the separating member 48 in the convex portion 48c3, and a free end of the arm portion 48c2. In contact with the side end face 48c7.

従って、位相決め部46dは、離間部材48が順回転方向(図中矢印A3方向)へ回転することを斜面46d1によって規制し、逆回転方向(図中矢印A4方向)へ回転することを逆回転規制部46d2によって規制する。   Accordingly, the phase determining portion 46d restricts the inclined member 46d from rotating in the forward rotation direction (arrow A3 direction in the figure) by the inclined surface 46d1, and reversely rotates in the reverse rotation direction (arrow A4 direction in the figure). It regulates by regulation part 46d2.

本実施例では、位相決め部46dと被位相決め部48cとによって、現像ローラ41と感光体ドラム1とを離間させる位相に離間部材48を位相決めする位相決め手段が構成される。   In this embodiment, the phase determining unit 46d and the phase-determined unit 48c constitute phase determining means for determining the phase of the separating member 48 to a phase for separating the developing roller 41 and the photosensitive drum 1.

図13及び図14を参照して、離間部材48が現像ローラ41を感光体ドラム1から離間させている状態から、離間部材48による離間状態が解除されて現像ローラ41と感光体ドラム1とが当接した状態になるまでの動作を説明する。   Referring to FIGS. 13 and 14, the separation member 48 is released from the state in which the separation member 48 separates the developing roller 41 from the photosensitive drum 1, and the separation state by the separation member 48 is released. The operation up to the contact state will be described.

図13(a)は、プロセスカートリッジ120の製造後からユーザーがプロセスカートリッジ120を使用開始するまでの物流又は保管流中の状態を示している。   FIG. 13A shows a state of physical distribution or storage from the manufacture of the process cartridge 120 until the user starts using the process cartridge 120.

この状態では、離間部材48は、当接部48bの当接面48b1が感光体ドラム1と当接する位相にある。これにより、現像ローラ41は、感光体ドラム1から離間させられている。このとき、離間部材48の被位相決め部48cの凸形状部48c3は、軸受部材46の位相決め部46dに収まっている。この状態で、プロセスカートリッジ120が物流又は保管中に大きな衝撃を受けたとしても、図11を参照して説明した実施例1の場合と同様に、離間部材48の位相が決められているので、現像ローラ41と感光体ドラム1との離間状態が維持される。   In this state, the separation member 48 is in a phase where the contact surface 48b1 of the contact portion 48b contacts the photosensitive drum 1. Accordingly, the developing roller 41 is separated from the photosensitive drum 1. At this time, the convex portion 48 c 3 of the phased portion 48 c of the separating member 48 is accommodated in the phase determining portion 46 d of the bearing member 46. In this state, even if the process cartridge 120 receives a large impact during distribution or storage, the phase of the separation member 48 is determined as in the case of the first embodiment described with reference to FIG. The separated state between the developing roller 41 and the photosensitive drum 1 is maintained.

図13(b)は、ユーザーがプロセスカートリッジ120の使用を開始した時の状態を示している。   FIG. 13B shows a state when the user starts using the process cartridge 120.

ユーザーがプロセスカートリッジ120の使用を開始すると、感光体ドラム1は装置本体110の駆動源(図示せず)からの駆動力を受けて図中矢印R1方向に回転する。離間部材48は、当接部48bと感光体ドラム1との摩擦力を受けて、図中矢印A3で示すように感光体ドラム1との当接位置で当接部48bが感光体ドラム1に対して順方向に移動する方向に回転し始める。この回転方向が離間部材48の順回転方向である。   When the user starts using the process cartridge 120, the photosensitive drum 1 receives a driving force from a driving source (not shown) of the apparatus main body 110 and rotates in the direction of arrow R1 in the drawing. The spacing member 48 receives the frictional force between the contact portion 48b and the photosensitive drum 1, and the contact portion 48b contacts the photosensitive drum 1 at the contact position with the photosensitive drum 1 as indicated by an arrow A3 in the figure. On the other hand, it starts to rotate in the direction of moving in the forward direction. This rotation direction is the forward rotation direction of the separating member 48.

このとき、離間部材48の被位相決め部48cは、弾性変形可能なアーム部47dが図13(a)の状態よりも更に撓まされることによって、位相決め部46dの斜面46d1から離脱しようとする。   At this time, the phase-determined portion 48c of the separating member 48 tends to be detached from the inclined surface 46d1 of the phase determining portion 46d by further bending the elastically deformable arm portion 47d than in the state of FIG. .

ここで、斜面46d1は、離間部材48が順回転方向(図中矢印A3方向)へ回転したときに、離間部材48のアーム部48c2を図中矢印A5方向に変形させる方向へ傾いている。又、位相決め部46には、離間部材48の逆回転方向(図中矢印A4方向)の回転を規制する逆回転規制部46d2が設けられている。本実施例では、逆回転規制部46d2は、離間部材48の回転方向(図中矢印A3方向又はA4方向)に垂直な面を有する。これにより、物流又は保管中の振動によって感光体ドラム4が正規の回転方向(図中矢印R1方向)とは逆方向に回転した場合に、感光体ドラム1と共に離間部材48が逆回転方向(図中矢印A4方向)に回転することを防止することができる。但し、所望により、逆回転規制部46d2を設けない構成としてもよい。   Here, the inclined surface 46d1 is inclined in a direction in which the arm portion 48c2 of the separating member 48 is deformed in the arrow A5 direction in the drawing when the separating member 48 rotates in the forward rotation direction (the arrow A3 direction in the drawing). In addition, the phase determining portion 46 is provided with a reverse rotation restricting portion 46d2 for restricting the rotation of the separating member 48 in the reverse rotation direction (arrow A4 direction in the figure). In the present embodiment, the reverse rotation restricting portion 46d2 has a surface perpendicular to the rotation direction of the separation member 48 (the arrow A3 direction or the A4 direction in the drawing). As a result, when the photosensitive drum 4 rotates in a direction opposite to the normal rotation direction (in the direction of arrow R1 in the figure) due to vibration during distribution or storage, the separating member 48 together with the photosensitive drum 1 rotates in the reverse rotation direction (see FIG. It is possible to prevent rotation in the direction of the middle arrow A4). However, the reverse rotation restricting portion 46d2 may be omitted if desired.

離間部材48のアーム部48c2の撓み方向である図中矢印A5方向における位相決め部46dの斜面46d1の高さH1や逆回転規制部46d2の高さH2は、適宜設定することができる。その設定に際しては、物流又は保管中に生じる振動の大きさ、離間部材48のアーム部48c2が図中矢印A5方向に撓むときの撓み力、感光体ドラム1から受ける回転力などを考慮することができる。つまり、アーム部48c2が斜面46d1を乗り越える力は、離間部材48が感光体ドラム1から受ける離間部材48を回転させる力より小さく、且つ、物流又は保管中に離間部材48が回転してアーム部48c2が斜面46d1を乗り越える力よりも大きくする。   The height H1 of the inclined surface 46d1 of the phase determining portion 46d and the height H2 of the reverse rotation restricting portion 46d2 in the direction of arrow A5 in the figure, which is the bending direction of the arm portion 48c2 of the separating member 48, can be set as appropriate. In the setting, the magnitude of vibration generated during distribution or storage, the bending force when the arm portion 48c2 of the separating member 48 is bent in the direction of the arrow A5 in the figure, the rotational force received from the photosensitive drum 1, and the like are taken into consideration. Can do. That is, the force that the arm portion 48c2 gets over the inclined surface 46d1 is smaller than the force that the separation member 48 rotates from the photosensitive drum 1 and the separation member 48 rotates during distribution or storage, and the arm portion 48c2. Is greater than the force over the slope 46d1.

図14(a)は、離間部材48の被位相決め部48cの位相決め部46dとの係合が解除され、離間部材48の当接部48bが感光体ドラム1から離間しようとしている状態を示している。   FIG. 14A shows a state in which the engagement of the phased portion 48 c of the spacing member 48 with the phase determining portion 46 d is released and the contact portion 48 b of the spacing member 48 is about to be separated from the photosensitive drum 1. ing.

この状態では、離間部材48のアーム部48c2は撓まされていない自然状態に復帰している。そして、離間部材48は、感光体ドラム1との接触部Dから回転力を受けて回転を続ける。   In this state, the arm portion 48c2 of the separation member 48 has returned to a natural state where it is not bent. The separation member 48 continues to rotate by receiving a rotational force from the contact portion D with the photosensitive drum 1.

図14(b)は、離間部材48の回転が終了し、現像ローラ41と感光体ドラム1とが接触部Dで接触している状態を示している。   FIG. 14B shows a state in which the rotation of the separation member 48 is finished and the developing roller 41 and the photosensitive drum 1 are in contact with each other at the contact portion D.

離間部材48の当接部48bが感光体ドラム1に接触しなくなる位置まで回転すると、離間部材48は、現像ローラ41の芯材41aの回転に伴う摩擦力を受けて、順回転方向(図中矢印A3方向)に更に回転する。本実施例では、離間部材48は、感光体ドラム1と離間部材48の当接部48bとの最近接部が距離G3だけ離れる位置まで回転する。   When the contact member 48b of the separation member 48 is rotated to a position where it does not come into contact with the photosensitive drum 1, the separation member 48 receives a frictional force accompanying the rotation of the core member 41a of the developing roller 41, and the forward rotation direction (in the drawing). Further rotation in the direction of arrow A3). In this embodiment, the separation member 48 rotates to a position where the closest part between the photosensitive drum 1 and the contact portion 48b of the separation member 48 is separated by a distance G3.

又、現像枠体44には、離間部材48が順回転方向(図中矢印A3方向)に回転し過ぎないように、順回転規制部44cが設けられている。これにより、離間部材48は、順回転規制部44cと接触したところで、順回転方向への回転が規制される。   Further, the developing device frame 44 is provided with a forward rotation restricting portion 44c so that the separating member 48 does not rotate too much in the forward rotation direction (the direction of arrow A3 in the figure). Thereby, when the separation member 48 comes into contact with the forward rotation restricting portion 44c, the rotation in the forward rotation direction is restricted.

尚、本実施例では、非駆動側シール50Lは、離間部材48の被位相決め部48cと接触しない例を説明したが、離間部材8の動作を阻害しないのであれば、非駆動側シール50Lが離間部材の被位相決め部48cに接触してもよい。   In this embodiment, the non-drive side seal 50L has been described as not contacting the phased portion 48c of the separation member 48. However, if the operation of the separation member 8 is not hindered, the non-drive side seal 50L is You may contact the phased portion 48c of the spacing member.

又、本実施例では、被位相決め部48cは位相決め部46dに向かって突出した凸形状部48c3を有し、位相決め部46dはこれに対応する凹形状を有するものとした。この形状の関係を逆にして、被位相決め部48cを凹形状とし、位相決め部46dを凸形状としてもよい。   In the present embodiment, the phase-determined portion 48c has a convex portion 48c3 protruding toward the phase determining portion 46d, and the phase determining portion 46d has a concave shape corresponding thereto. By reversing this shape relationship, the phase-determining portion 48c may be concave, and the phase-determining portion 46d may be convex.

このように、本実施例では、位相決め部及び被位相決め部のうちの一方は、他方によって弾性変形させられる弾性変形部としてのアーム部48c2を有する。アーム部48c2は、当接部48bの感光体1又は端部部材1bへの当接状態が解除される方向に離間部材48が回転する際に、位相決め部の被位相決め部への作用が解除される方向に弾性変形させられる。又、本実施例では、上記位相決め部及び被位相決め部のうちの上記他方は、上記当接状態が解除される際とは逆方向に離間部材48が回転することを規制する逆回転規制部46d2を有する。   As described above, in this embodiment, one of the phasing portion and the phasing portion has the arm portion 48c2 as an elastic deformation portion that is elastically deformed by the other. The arm portion 48c2 acts on the phase-determined portion of the phase determining portion when the separating member 48 rotates in a direction in which the contact state of the contact portion 48b with the photoreceptor 1 or the end member 1b is released. It is elastically deformed in the releasing direction. Further, in this embodiment, the other of the phasing portion and the phasing portion is a reverse rotation restriction that restricts the rotation of the separating member 48 in the opposite direction to that when the contact state is released. Part 46d2.

以上、本実施例によれば、実施例1と同様の効果を得ることができる。又、本実施例によれば、被位相決め部48cと位相決め部46dの形状によって、実施例1よりも離間部材48を位相決めする力を大きくし易い。   As described above, according to this embodiment, it is possible to obtain the same effects as those of the first embodiment. Further, according to the present embodiment, it is easier to increase the force for phasing the separating member 48 than in the first embodiment due to the shapes of the phased portion 48c and the phase determining portion 46d.

実施例3
次に、本発明の他の実施例について説明する。本実施例の現像装置、プロセスカートリッジ及び画像形成装置の基本的な構成及び動作は、実施例1、2のものと同じである。従って、実施例1、2の画像形成装置のものと同一又はそれに相当する機能、構成を有する要素には同一符号を付して、詳しい説明は省略する。
Example 3
Next, another embodiment of the present invention will be described. The basic configurations and operations of the developing device, process cartridge, and image forming apparatus of the present embodiment are the same as those of the first and second embodiments. Accordingly, elements having the same or corresponding functions and configurations as those of the image forming apparatuses according to the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

特に、本実施例では、離間部材の位相決め手段の構成は、実施例2のものと実質的に同じである。   In particular, in the present embodiment, the configuration of the phasing means for the spacing member is substantially the same as that of the second embodiment.

図15は、本実施例における離間部材48の近傍を示す断面図である。又、図16は、本実施例における離間部材48の近傍を示す組立斜視図である。   FIG. 15 is a cross-sectional view showing the vicinity of the separation member 48 in the present embodiment. FIG. 16 is an assembled perspective view showing the vicinity of the separation member 48 in this embodiment.

本実施例では、物流又は保管中の衝撃が大きいと想定され、離間部材48の被位相決め部48cを位相決めする力を大きくする必要がある場合における、離間部材48を回転させる構成の変形例について説明する。   In the present embodiment, it is assumed that the impact during distribution or storage is large, and a modification of the configuration in which the spacing member 48 is rotated when the force for phasing the phased portion 48c of the spacing member 48 needs to be increased. Will be described.

ここで、離間部材48を位相決めする力は、例えば離間部材48の被位相決め部48cの一部である弾性変形可能なアーム部48c2の剛性を高めることで大きくすることができる。即ち、アーム部48c2を変形し難くすることで、離間部材48を位相決めする力を大きくすることができる。又は、離間部材48を位相決めする力は、図13(a)に示す矢印A5方向における位相決め部46dの斜面46d1の高さH1を高くして、離間部材48のアーム部48c2を撓ませなければならない量を大きくすることで大きくすることができる。   Here, the force for phasing the separating member 48 can be increased by increasing the rigidity of the elastically deformable arm portion 48c2, which is a part of the phased portion 48c of the separating member 48, for example. That is, by making the arm portion 48c2 difficult to deform, it is possible to increase the force for determining the phase of the separating member 48. Alternatively, the force for phasing the spacing member 48 must bend the arm portion 48c2 of the spacing member 48 by increasing the height H1 of the slope 46d1 of the phasing portion 46d in the direction of arrow A5 shown in FIG. It can be increased by increasing the amount that must be achieved.

しかし、このように離間部材48を位相決めする力を大きくすると、離間部材48は、当接部48bと感光体ドラム1との摩擦力から受ける力だけでは回転できなくなる可能性がある。   However, if the force for phasing the spacing member 48 is increased in this way, the spacing member 48 may not be able to rotate with only the force received from the frictional force between the contact portion 48 b and the photosensitive drum 1.

そこで、本実施例では、感光体ドラム1の非駆動側端部部材1bが、離間部材48の当接部48bと係合して離間部材48を強制的に回転させる係合部としての離間解除部1cを有する。即ち、本実施例では、感光体ドラム1と一体化された非駆動側端部部材1bには、感光体ドラム1の半径方向内側に凹状に切り欠かれた離間解除部1cが設けられている。   Therefore, in this embodiment, the non-drive side end member 1b of the photosensitive drum 1 is engaged with the contact portion 48b of the separation member 48 to release the separation as an engagement portion that forcibly rotates the separation member 48. Part 1c. In other words, in this embodiment, the non-driving side end member 1b integrated with the photosensitive drum 1 is provided with a separation releasing portion 1c that is cut out in a concave shape inward in the radial direction of the photosensitive drum 1. .

即ち、本実施例では、現像ローラ41の芯材41aに取り付けられた離間部材48の当接部48bは、離間解除部1cに当接し、現像ローラ41を感光体ドラム1から離間させる。   In other words, in this embodiment, the contact portion 48 b of the separation member 48 attached to the core member 41 a of the developing roller 41 contacts the separation release portion 1 c and separates the developing roller 41 from the photosensitive drum 1.

そして、感光体ドラム1が回転すると、それに伴って非駆動側端部部材1bも同方向に一体的に回転する。すると、離間解除部1cにおいて感光体ドラム1の回転方向の上流側に位置する、感光体ドラム1の半径方向に延びる解除面1c1は、離間部材48を押す。より詳細には、解除面1c1は、離間部材48の順回転方向(図中矢印A3方向)における上流側の、離間部材48の当接面48b1の近傍の当接部48bの側面48b2を押す。このように、離間解除部1cは、当接部48bに係合して離間部材48を回転させる。この離間解除部1cによる離間部材48を回転させる力は、実施例1、2における感光体ドラム1と離間部材48との摩擦力よりも、容易に大きくすることができる。   When the photosensitive drum 1 rotates, the non-driving side end member 1b also rotates integrally in the same direction. Then, the release surface 1c1 extending in the radial direction of the photosensitive drum 1 located on the upstream side in the rotation direction of the photosensitive drum 1 in the separation release portion 1c presses the separation member 48. More specifically, the release surface 1c1 pushes the side surface 48b2 of the contact portion 48b in the vicinity of the contact surface 48b1 of the separation member 48 on the upstream side in the forward rotation direction (arrow A3 direction in the drawing) of the separation member 48. In this manner, the separation release portion 1c is engaged with the contact portion 48b to rotate the separation member 48. The force for rotating the separation member 48 by the separation release portion 1c can be easily made larger than the frictional force between the photosensitive drum 1 and the separation member 48 in the first and second embodiments.

このように、本実施例では、当接部48bは、端部部材1bに当接するようになっている。そして、端部部材1bは、当接部48bの端部部材1bへの当接状態を解除する際に当接部1bと係合して離間部材48を回転させる係合部としての離間解除部1cを有する。   Thus, in the present embodiment, the contact portion 48b comes into contact with the end member 1b. The end member 1b engages with the contact portion 1b when the contact state of the contact portion 48b with the end member 1b is released, and the separation release portion serves as an engagement portion that rotates the separation member 48. 1c.

尚、本実施例では、図16に示すように、感光体ドラム1の非駆動側端部部材1bは、離間部材48とほぼ正対する位置にある。しかし、図17(a)に示すように、感光体ドラム1の非駆動側端部部材1bは、プロセスカートリッジ120の長手方向において図16に示す位置よりも非駆動側端部側に配置されていてもよい。この場合は、図17(a)に示すように、離間部材48の当接部48bを、プロセスカートリッジ120の長手方向において非駆動側端部側に延長した形状とすることで、当接部48bを非駆動側端部部材1bに当接させることができる。   In this embodiment, as shown in FIG. 16, the non-driving side end member 1 b of the photosensitive drum 1 is in a position substantially facing the separation member 48. However, as shown in FIG. 17A, the non-driving side end member 1b of the photosensitive drum 1 is disposed closer to the non-driving side end than the position shown in FIG. May be. In this case, as shown in FIG. 17A, the contact portion 48 b of the separation member 48 is extended to the non-driving side end portion side in the longitudinal direction of the process cartridge 120, so that the contact portion 48 b. Can be brought into contact with the non-driving side end member 1b.

図17(b)は、この場合の離間部材48の斜視図である。同図に示す離間部材48では、当接部48bは、感光体ドラム1の非駆動側端部部材1bの離間解除部1cと接触することができる当接面48b1が図中L1で示す幅まで延長されている。   FIG. 17B is a perspective view of the separating member 48 in this case. In the spacing member 48 shown in the figure, the abutting portion 48b has a contacting surface 48b1 that can come into contact with the spacing releasing portion 1c of the non-driving side end member 1b of the photosensitive drum 1 up to the width indicated by L1 in the drawing. It has been extended.

以上、本実施例によれば、実施例1、2と同様の効果を得ることができる。又、本実施例によれば、感光体ドラム1の端部部材1bに設けた離間解除部1cで離間部材48を回転させることで、より確実に現像ローラ41と感光体ドラム1との離間状態を解除することができる。   As described above, according to this embodiment, the same effects as those of Embodiments 1 and 2 can be obtained. Further, according to the present embodiment, the separation member 48 is rotated by the separation release portion 1 c provided on the end member 1 b of the photosensitive drum 1, so that the developing roller 41 and the photosensitive drum 1 are separated more reliably. Can be released.

尚、本実施例のような離間部材を回転させる方法は、実施例2に限らず、本明細書に記載の他の実施例にも同様に適用することができる。   Note that the method of rotating the separation member as in the present embodiment is not limited to the second embodiment, and can be similarly applied to other embodiments described in this specification.

実施例4
次に、本発明の他の実施例について説明する。本実施例の現像装置、プロセスカートリッジ及び画像形成装置の基本的な構成及び動作は、実施例1、2のものと同じである。従って、実施例1、2の画像形成装置のものと同一又はそれに相当する機能、構成を有する要素には同一符号を付して、詳しい説明は省略する。
Example 4
Next, another embodiment of the present invention will be described. The basic configurations and operations of the developing device, process cartridge, and image forming apparatus of the present embodiment are the same as those of the first and second embodiments. Accordingly, elements having the same or corresponding functions and configurations as those of the image forming apparatuses according to the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

ユーザーがプロセスカートリッジの使用を開始した後に、感光体とプロセス手段とを使用中よりも離された状態にする規制部材が感光体やその他の部品と接触すると、画像不良を起こす可能性がある。規制部材が感光体やその他の部品に接触しても、感光体やその他の部品を傷つけないように、規制部材の材料を限定すると、コストが増大することが懸念される。そのため、規制部材による離間状態を解除した後には、規制部材が感光体やそれの他の部品と接触することがないようにすることも重要である。   If a regulating member that puts the photosensitive member and the process means away from each other than in use after the user starts using the process cartridge comes into contact with the photosensitive member or other parts, an image defect may occur. If the material of the regulating member is limited so that the regulating member does not damage the photosensitive member and other parts even if the regulating member comes into contact with the photosensitive body and other parts, there is a concern that the cost increases. For this reason, it is also important that the regulating member does not come into contact with the photosensitive member or other parts after the separated state by the regulating member is released.

従って、本実施例の目的は、使用開始した後に、感光体とプロセス手段とを使用中よりも離された状態にしていた規制部材が、周辺の部品と接触することを防止することである。   Therefore, an object of the present embodiment is to prevent the regulating member, which has been separated from the photoconductor and the process means after being used, from coming into contact with surrounding components.

そこで、本実施例では、実施例2と同様の規制部材たる離間部材の位相決め手段の構成に加えて、現像ローラ41と感光体ドラム1との離間状態を解除した後に、離間部材の更なる位相決めを行う構成を有する。   Therefore, in this embodiment, in addition to the configuration of the phasing member phasing means, which is the same as the restricting member in the second embodiment, after the detaching state between the developing roller 41 and the photosensitive drum 1 is canceled, the detaching member is further increased. It has a configuration for determining the phase.

図18及び図19は、図12中の矢印Vで示すように現像枠体44の内部から非駆動側軸受け部材46の方向に見た、現像ローラ41及び供給ローラ42の非駆動側端部近傍の断面図である。   18 and 19 show the vicinity of the non-driving side end portions of the developing roller 41 and the supply roller 42 as viewed from the inside of the developing frame 44 toward the non-driving side bearing member 46 as indicated by an arrow V in FIG. FIG.

図18及び図19を参照して、離間部材48が現像ローラ41を感光体ドラム1から離間させている状態から、離間部材48による離間状態が解除されて現像ローラ41と感光体ドラム1とが当接した状態になるまでの動作を説明する。   Referring to FIGS. 18 and 19, from the state where the separating member 48 separates the developing roller 41 from the photosensitive drum 1, the separating state by the separating member 48 is released, and the developing roller 41 and the photosensitive drum 1 are separated from each other. The operation up to the contact state will be described.

図18(a)は、プロセスカートリッジ120の製造後からユーザーがプロセスカートリッジ120を使用開始するまでの物流又は保管流中の状態を示している。   FIG. 18A shows a state in the physical distribution or storage flow from the manufacture of the process cartridge 120 until the user starts using the process cartridge 120.

この状態では、離間部材48は、当接部48bの当接面48b1が感光体ドラム1と当接する位相にある。これにより、現像ローラ41は、感光体ドラム1から離間させられている。   In this state, the separation member 48 is in a phase where the contact surface 48b1 of the contact portion 48b contacts the photosensitive drum 1. Accordingly, the developing roller 41 is separated from the photosensitive drum 1.

本実施例においても、非駆動側軸受部材46には、実施例2における位相決め部と実質的に同じ構成の位相決め部46dが設けられている。本実施例では更に、非駆動側軸受部材46には、ガイド部46eが設けられている。ガイド部46eは、離間部材48の順回転方向(図中矢印A3方向)において位相決め部46dよりも下流側に設けられている。ガイド部46eは、詳しくは後述するように、離間部材48の被位相決め部48cと接触するガイド面46e1及び位相決め面46e2を有する。   Also in the present embodiment, the non-driving side bearing member 46 is provided with a phasing portion 46d having substantially the same configuration as the phasing portion in the second embodiment. In the present embodiment, the non-driving side bearing member 46 is further provided with a guide portion 46e. The guide portion 46e is provided on the downstream side of the phase determining portion 46d in the forward rotation direction of the separating member 48 (in the direction of arrow A3 in the figure). As will be described in detail later, the guide portion 46e has a guide surface 46e1 and a phase determining surface 46e2 that come into contact with the phase determining portion 48c of the separation member 48.

図18(b)は、ユーザーがプロセスカートリッジ120の使用を開始した時の状態を示している。   FIG. 18B shows a state when the user starts using the process cartridge 120.

実施例2と同様に、感光体ドラム1が順回転方向(図中矢印A3方向)へ回転すると、離間部材48のアーム部48c2が弾性的に変形させられながら、離間部材48の凸形状部48c3が位相決め部46dから離脱される。   Similarly to the second embodiment, when the photosensitive drum 1 rotates in the forward rotation direction (the direction of arrow A3 in the figure), the arm portion 48c2 of the separation member 48 is elastically deformed, and the convex portion 48c3 of the separation member 48 is obtained. Is removed from the phase determination unit 46d.

図19(a)は、離間部材48が順回転方向(図中矢印A3方向)に更に回転し、被位相決め部48cの凸形状部48c3が、同方向におけるガイド面46e1の端部位置E1に近傍にある状態を示している。   In FIG. 19A, the separating member 48 further rotates in the forward rotation direction (in the direction of arrow A3 in the drawing), and the convex portion 48c3 of the phased portion 48c is at the end position E1 of the guide surface 46e1 in the same direction. The state in the vicinity is shown.

離間部材48のアーム部48c2は、ガイド部46eのガイド面46e1に凸形状部48c3が接触しているとき、円環状部48aの半径方向内側に撓ませられたままになっている。   The arm portion 48c2 of the spacing member 48 remains bent radially inward of the annular portion 48a when the convex portion 48c3 is in contact with the guide surface 46e1 of the guide portion 46e.

図19(b)は、離間部材48の回転が終了し、現像ローラ41と感光体ドラム1とが接触部Dで接触している状態を示している。   FIG. 19B shows a state in which the rotation of the separation member 48 is finished and the developing roller 41 and the photosensitive drum 1 are in contact with each other at the contact portion D.

図20により詳しく示すように、ガイド面46e1よりも離間部材48の順回転方向(図中矢印A3方向)の下流側に連続して位相決め面46e2が設けられている。この位相決め面46e2は、離間部材48の回転方向における上記端部位置E1での凸形状部48c3の頂部48c4の接線から、円環状部48aの半径方向外側に角度θだけ傾けた面で構成されている。   As shown in more detail in FIG. 20, a phasing surface 46e2 is provided continuously downstream of the guide surface 46e1 in the forward rotation direction (arrow A3 direction in the drawing) of the separating member 48. The phasing surface 46e2 is configured by a surface inclined by an angle θ from the tangent to the top 48c4 of the convex portion 48c3 at the end position E1 in the rotation direction of the separation member 48 outward in the radial direction of the annular portion 48a. ing.

これにより、離間部材48が順方向(矢印A3方向)に更に回転して凸形状部48c3の頂部48c4が上記端部位置E1を超えると、離間部材48は、アーム部48c2が弾性変形された状態から戻ろうとする力Fの垂直効力Fnの分力Fsの力で回転力を受ける。   Thereby, when the separating member 48 further rotates in the forward direction (arrow A3 direction) and the top portion 48c4 of the convex portion 48c3 exceeds the end position E1, the separating member 48 is in a state where the arm portion 48c2 is elastically deformed. Rotational force is received by the component force Fs of the vertical effect Fn of the force F to return from

この回転力によって、離間部材48は、図19(b)に示すように、感光体ドラム1からの力を受けなくても回転する。本実施例では、離間部材48は、図中Xで示す距離の分だけ、位相決め面46e2によって回転させられる。この距離Xは、離間部材48の凸形状部48c3の頂部48c4が、離間部材48の順回転方向(図中矢印A3方向)において、ガイド面46e1の端部位置E1から位相決め面46e2の端部位置E2に進むまでの間の距離である。その結果、離間部材48は、感光体ドラム1と当接部48bとの最近接部が距離G4だけ離れる位置まで回転する。   Due to this rotational force, the separating member 48 rotates without receiving a force from the photosensitive drum 1 as shown in FIG. In the present embodiment, the separating member 48 is rotated by the phasing surface 46e2 by the distance indicated by X in the drawing. This distance X is such that the apex portion 48c4 of the convex portion 48c3 of the spacing member 48 is shifted from the end position E1 of the guide surface 46e1 to the end portion of the phase determining surface 46e2 in the forward rotation direction of the spacing member 48 (in the direction of arrow A3 in the drawing) This is the distance to the position E2. As a result, the separation member 48 rotates to a position where the closest portion between the photosensitive drum 1 and the contact portion 48b is separated by a distance G4.

本実施例では、離間部材48は、現像ローラ41の芯材41aからの摩擦力に関係なく、図19(b)に示す状態で位相決めされる。ガイド部46eの位相決め面46e2による位相決めによって、離間部材48は逆回転方向(図中矢印A4方向)には回転しない。   In the present embodiment, the spacing member 48 is phased in the state shown in FIG. 19B regardless of the frictional force from the core material 41a of the developing roller 41. Due to the phasing by the phasing surface 46e2 of the guide portion 46e, the separating member 48 does not rotate in the reverse rotation direction (arrow A4 direction in the figure).

本実施例では、位相決め部46dと被位相決め部48cとによって、現像ローラ41と感光体ドラム1とを離間させる第1の位相に離間部材48を位相決めする位相決め手段が構成される。又、本実施例では、解除後位相決め部としてのガイド部46eと被位相決め部48cとによって、解除後位相決め手段が構成される。この解除後位相決め手段は、離間部材48による現像ローラ41と感光体ドラム1との離間状態を解除した後に、離間部材48を感光体ドラム1と接触しない待避した第2の位相に位相決めする。より詳細には、ガイド部46eは、位相決め面46e2が離間部材48の被位相決め部48cに作用することで、解除後の離間部材48の位相を決める。   In this embodiment, the phase determining unit 46d and the phase-determined unit 48c constitute phase determining means for determining the phase of the separating member 48 to the first phase for separating the developing roller 41 and the photosensitive drum 1. In this embodiment, the post-cancel phase determining means is constituted by the guide portion 46e as the post-cancel phase determining section and the phase-determined section 48c. The post-release phase determining means releases the separation state between the developing roller 41 and the photosensitive drum 1 by the separation member 48 and then sets the separation member 48 to the second phase that is retracted so as not to contact the photosensitive drum 1. . In more detail, the guide part 46e determines the phase of the separation member 48 after cancellation | release, when the phase determination surface 46e2 acts on the to-be-phased part 48c of the separation member 48. FIG.

又、現像枠体44には、離間部材48が順回転方向(図中矢印A3方向)に回転し過ぎないように、順回転規制部44cが設けられている。これにより、離間部材48は、順回転規制部44cと接触したところで、順回転方向への回転が規制される。   Further, the developing device frame 44 is provided with a forward rotation restricting portion 44c so that the separating member 48 does not rotate too much in the forward rotation direction (the direction of arrow A3 in the figure). Thereby, when the separation member 48 comes into contact with the forward rotation restricting portion 44c, the rotation in the forward rotation direction is restricted.

本実施例によれば、例えば現像装置4の設計要件などにより、現像ローラ41が感光体ドラム1の重力方向上側にくる場合でも、離間状態を解除した後における離間部材48の当接部48bと感光体ドラム1との接触を防ぐことができる。そのため、離間部材48が不用意に感光体ドラム1に接触することによる画像不良の発生を防ぐことができる。   According to the present embodiment, even when the developing roller 41 is located above the photosensitive drum 1 in the gravitational direction due to, for example, the design requirements of the developing device 4, the contact portion 48b of the separating member 48 after the separated state is released. Contact with the photosensitive drum 1 can be prevented. For this reason, it is possible to prevent the occurrence of image defects due to the separation member 48 inadvertently contacting the photosensitive drum 1.

このように、本実施例では、現像装置4は更に、解除後位相決め部としてのガイド部46eを有する。ガイド部46eは、当接部48bの感光体1又は端部部材1bへの当接状態が解除された後に、離間部材48に作用して、離間部材48の回転方向の位置を、当接部48bが感光体1に接触しない位置に決める。本実施例では、位相決め部46dは、上記当接状態が解除される際の離間部材48の回転方向において、ガイド部46eよりも上流にある。特に、本実施例では、ガイド部46eは、弾性変形部としてのアーム部48c2の反発力を受けて、上記当接状態が解除される際の回転方向に離間部材48を回転させる部位(位相決め面)46e2を有する。   As described above, in this embodiment, the developing device 4 further includes the guide portion 46e as a post-cancel phase determining portion. The guide portion 46e acts on the separation member 48 after the contact state of the contact portion 48b with the photoreceptor 1 or the end member 1b is released, and the position of the separation member 48 in the rotational direction is changed to the contact portion. The position 48b is determined so as not to contact the photoreceptor 1. In this embodiment, the phase determining portion 46d is upstream of the guide portion 46e in the rotational direction of the separating member 48 when the contact state is released. In particular, in this embodiment, the guide portion 46e receives the repulsive force of the arm portion 48c2 as an elastically deforming portion, and rotates the separation member 48 in the rotation direction when the contact state is released (phase determination). Surface) 46e2.

以上、本実施例によれば、実施例1、2と同様の効果を得ることができる。又、本実施例によれば、位相決め手段による位相決めが解除され、離間部材48による現像ローラ41と感光体ドラム1との離間状態が解除された後に、更に離間部材48の位相を決める解除後位相決め手段を設ける。これにより、離間部材48による現像ローラ41と感光体ドラム1との離間状態が解除された後における、離間部材48と感光体ドラム1との接触をより確実に回避することができる。   As described above, according to this embodiment, the same effects as those of Embodiments 1 and 2 can be obtained. Further, according to the present embodiment, the phase determination by the phase determining means is released, and after the separation state between the developing roller 41 and the photosensitive drum 1 by the separation member 48 is released, the release of determining the phase of the separation member 48 is further performed. Post-phase determining means is provided. Thereby, the contact between the separation member 48 and the photosensitive drum 1 after the separation state between the developing roller 41 and the photosensitive drum 1 by the separation member 48 is released can be more reliably avoided.

即ち、本実施例によれば、使用開始後の離間部材の位相を決めて、使用中に離間部材が周辺の部品と接触することを防止することができる。これにより、使用中に離間部材が周辺の部品と接触することによる画像不良の可能性をより小さくすることができる。   That is, according to the present embodiment, it is possible to determine the phase of the spacing member after the start of use and prevent the spacing member from contacting peripheral components during use. Thereby, the possibility of image defects due to the spacing member coming into contact with surrounding components during use can be further reduced.

実施例5
次に、本発明の他の実施例について説明する。本実施例の現像装置、プロセスカートリッジ及び画像形成装置の基本的な構成及び動作は、実施例1、2のものと同じである。従って、実施例1、2の画像形成装置のものと同一又はそれに相当する機能、構成を有する要素には同一符号を付して、詳しい説明は省略する。
Example 5
Next, another embodiment of the present invention will be described. The basic configurations and operations of the developing device, process cartridge, and image forming apparatus of the present embodiment are the same as those of the first and second embodiments. Accordingly, elements having the same or corresponding functions and configurations as those of the image forming apparatuses according to the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

上述の各実施例では、離間部材48は、現像ローラ41の芯材41aに取り付けられて、回転可能に支持される構成とした。しかし、離間部材48は、現像ローラ41の芯材41a以外の場所へ取り付け、支持させる構成とすることも可能である。   In each of the above-described embodiments, the separating member 48 is attached to the core member 41a of the developing roller 41 and is rotatably supported. However, the separating member 48 may be configured to be attached and supported at a place other than the core material 41a of the developing roller 41.

図21は、一例として、実施例4と同様の離間部材の位相決め手段の構成において、離間部材48が現像ローラ41の芯材41a以外の場所へ取り付けられる場合の組立斜視図である。   FIG. 21 is an assembly perspective view in the case where the spacing member 48 is attached to a place other than the core material 41a of the developing roller 41 in the configuration of the spacing member phasing means similar to that of the fourth embodiment.

例えば、図21に示すように、離間部材48の支持手段として、非駆動側軸受部材46に支持部46fを設けることができる。この支持部46fは、非駆動側軸受部材46に設けられた現像ローラ41の芯材41aを支持する現像ローラ支持穴46bと同軸の、現像枠体44側に突出した円筒形状とされている。そして、支持受け部としての離間部材48の円環状部48aの内径部48a1を、この支持部46fに嵌合させることで、離間部材48は非駆動側軸受部材46によって回転可能に支持される。   For example, as shown in FIG. 21, a support portion 46 f can be provided on the non-driving side bearing member 46 as a support means for the separation member 48. The support portion 46f has a cylindrical shape that is coaxial with the developing roller support hole 46b that supports the core member 41a of the developing roller 41 provided in the non-driving side bearing member 46 and protrudes toward the developing frame 44. Then, the spacing member 48 is rotatably supported by the non-driving side bearing member 46 by fitting the inner diameter portion 48a1 of the annular portion 48a of the spacing member 48 as a support receiving portion into the support portion 46f.

このような離間部材48の取り付け方法によっても、上記各実施例におけるものと同様の、現像ローラ41と感光体ドラム1との離間、及びその離間の解除の動作を実現することができる。   Also by such a method of attaching the separation member 48, it is possible to realize the operation of separating the developing roller 41 and the photosensitive drum 1 and releasing the separation, similar to those in the above embodiments.

尚、本実施例のような離間部材の支持方法は、実施例4に限らず、本明細書に記載の他の実施例にも同様に適用することができる。   In addition, the support method of the spacing member as in the present embodiment is not limited to the fourth embodiment, and can be similarly applied to other embodiments described in this specification.

実施例6
次に、本発明の他の実施例について説明する。本実施例の現像装置、プロセスカートリッジ及び画像形成装置の基本的な構成及び動作は、実施例1、2のものと同じである。従って、実施例1、2の画像形成装置のものと同一又はそれに相当する機能、構成を有する要素には同一符号を付して、詳しい説明は省略する。
Example 6
Next, another embodiment of the present invention will be described. The basic configurations and operations of the developing device, process cartridge, and image forming apparatus of the present embodiment are the same as those of the first and second embodiments. Accordingly, elements having the same or corresponding functions and configurations as those of the image forming apparatuses according to the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

本実施例では、非駆動側軸受部材46が、弾性変形可能な位相決め部を有し、離間部材48がこの位相決め部が係合する被位相決め部を有する。   In the present embodiment, the non-driving side bearing member 46 has a phase determining portion that can be elastically deformed, and the separation member 48 has a phase determining portion with which the phase determining portion is engaged.

図22は、現像装置4の長手方向における非駆動側の端部を示した組立斜視図である。図23は、図22中の矢印Vで示すように現像枠体44の内部から非駆動側軸受部材46の方向に見た、現像ローラ41及び供給ローラ42の非駆動側端部近傍の断面図である。   FIG. 22 is an assembled perspective view showing an end portion on the non-driving side in the longitudinal direction of the developing device 4. 23 is a cross-sectional view of the vicinity of the non-driving side end portions of the developing roller 41 and the supply roller 42 as viewed from the inside of the developing frame 44 toward the non-driving side bearing member 46 as indicated by an arrow V in FIG. It is.

本実施例では、非駆動側軸受部材46には、弾性変形可能な位相決め部としての係止板46gが設けられている。この係止板46gは、現像装置4の長手方向に現像枠体44側に延びる弾性変形部としてのアーム状の基部46g1と、この基部46g1の先端近傍に設けられた係止部46g2と、を有する。本実施例では、係止板46gの基部46g1は、現像ローラ支持穴46bの上方に設けられており、係止板46gの係止部46g2は下方の現像ローラ41の芯材41aの中心軸線に向かう方向且つ現像装置4の長手方向に沿って延びている。そして、この係止板46gは、基部46g1が弾性変形することで、係止部46g2が図中矢印A6で示すような現像ローラ41の芯材41aから遠ざかる方向に移動することができるようになっている。   In this embodiment, the non-driving side bearing member 46 is provided with a locking plate 46g as a phase determining portion capable of elastic deformation. The locking plate 46g includes an arm-shaped base 46g1 as an elastically deforming portion extending toward the developing frame 44 in the longitudinal direction of the developing device 4, and a locking portion 46g2 provided in the vicinity of the tip of the base 46g1. Have. In this embodiment, the base 46g1 of the locking plate 46g is provided above the developing roller support hole 46b, and the locking portion 46g2 of the locking plate 46g is aligned with the central axis of the core material 41a of the developing roller 41 below. It extends in the direction toward and along the longitudinal direction of the developing device 4. Then, the locking plate 46g can move in a direction in which the locking portion 46g2 moves away from the core material 41a of the developing roller 41 as indicated by an arrow A6 in the drawing because the base portion 46g1 is elastically deformed. ing.

又、本実施例では、離間部材48は、現像装置4の長手方向に所定の厚さを有する円環状部48aを有する。又、離間部材48は、円環状部48aからその半径方向外側に突出した当接部48bを有する。本実施例では、円環状部48a、当接部48bは、現像装置4の長手方向において同一の所定の厚さを有し、該長手方向の両側面は面一とされている。更に、本実施例では、離間部材48は、円環状部48aの外周面に、被位相決め部としての切り欠き48dが設けられている。切り欠き48dは、現像装置4の長手方向に沿って延びる溝状に形成されている。離間部材48は、現像ローラ41の芯材41aが円環状部48aの内径部48a1に嵌合することで、該現像ローラ41の芯材41aによって回転可能に支持される。   In this embodiment, the separating member 48 has an annular portion 48 a having a predetermined thickness in the longitudinal direction of the developing device 4. The spacing member 48 has an abutting portion 48b that protrudes radially outward from the annular portion 48a. In this embodiment, the annular portion 48a and the contact portion 48b have the same predetermined thickness in the longitudinal direction of the developing device 4, and both side surfaces in the longitudinal direction are flush with each other. Furthermore, in the present embodiment, the spacing member 48 is provided with a notch 48d as a portion to be phased on the outer peripheral surface of the annular portion 48a. The notch 48 d is formed in a groove shape extending along the longitudinal direction of the developing device 4. The spacing member 48 is rotatably supported by the core material 41a of the developing roller 41 by fitting the core material 41a of the developing roller 41 to the inner diameter portion 48a1 of the annular portion 48a.

本実施例では、係止板46gと切り欠き48dとによって、現像ローラ41と感光体ドラム1とを離間させる位相に離間部材48を位相決めする位相決め手段が構成される。   In the present embodiment, the locking plate 46g and the notch 48d constitute phase determining means for determining the phase of the separating member 48 to the phase for separating the developing roller 41 and the photosensitive drum 1 from each other.

そして、非駆動側軸受部材46の係止板46gの係止部46g2は、離間部材48の切り欠き48dと噛み合って、離間部材48の位相を決める。これにより、離間部材48によって現像ローラ41が感光体ドラム1から離間させられた状態が維持される。   The locking portion 46g2 of the locking plate 46g of the non-driving side bearing member 46 meshes with the notch 48d of the spacing member 48 to determine the phase of the spacing member 48. Thereby, the state in which the developing roller 41 is separated from the photosensitive drum 1 by the separation member 48 is maintained.

ユーザーがプロセスカートリッジ120の使用を開始すると、係止板46gの係止部46g2は離間部材48の切り欠き48dから離脱する。その後の過程は、実施例2の場合と概略同様であるため、詳しい説明は省略する。   When the user starts using the process cartridge 120, the locking portion 46g2 of the locking plate 46g is detached from the notch 48d of the spacing member 48. Since the subsequent process is substantially the same as that of the second embodiment, detailed description thereof is omitted.

以上、本実施例の構成によっても、実施例1、2と同様の効果を得ることができる。又、本実施例では、離間部材の位相決め手段の構成を比較的簡易とすることができる。   As described above, the same effects as those of the first and second embodiments can be obtained by the configuration of the present embodiment. In the present embodiment, the configuration of the phasing means for the separating member can be made relatively simple.

実施例7
次に、本発明の他の実施例について説明する。本実施例の現像装置、プロセスカートリッジ及び画像形成装置の基本的な構成及び動作は、実施例1、2のものと同じである。従って、実施例1、2の画像形成装置のものと同一又はそれに相当する機能、構成を有する要素には同一符号を付して、詳しい説明は省略する。
Example 7
Next, another embodiment of the present invention will be described. The basic configurations and operations of the developing device, process cartridge, and image forming apparatus of the present embodiment are the same as those of the first and second embodiments. Accordingly, elements having the same or corresponding functions and configurations as those of the image forming apparatuses according to the first and second embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

本実施例では、現像装置4の長手方向における現像枠体44の非駆動側の端面44aに離間部材48を取り付ける。   In the present embodiment, the separation member 48 is attached to the end surface 44 a on the non-driving side of the developing device frame 44 in the longitudinal direction of the developing device 4.

図24は、現像装置4の長手方向における非駆動側の端部を示した組立斜視図である。   FIG. 24 is an assembled perspective view showing an end portion on the non-driving side in the longitudinal direction of the developing device 4.

本実施例では、現像装置4の長手方向における現像枠体44の非駆動側の端面44aには、該長手方向の外側に向けて突出するように、円柱形状の支持部44dが設けられている。   In this embodiment, a cylindrical support portion 44d is provided on the non-driving side end face 44a of the developing device frame 44 in the longitudinal direction of the developing device 4 so as to protrude outward in the longitudinal direction. .

又、現像枠体44は、支持部44dの近傍に、弾性変形可能な位相決め部としての係止板44eが設けられている。この係止板44eの構成は、実施例6で説明したものと概略同様である。即ち、この係止板44eは、現像枠体44の非駆動側の端面44aから現像装置4の長手方向の外側に延びるアーム状の基部44e1と、この基部44e1の先端近傍に設けられた係止部44e2と、を有する。係止板44eの基部44e1は、支持部44dの斜め上方に設けられており、係止板44eの係止部44e2は斜め下方の支持部44dの中心軸線に向かう方向且つ現像装置4の長手方向に沿って延びている。そして、この係止板44eは、基部44e1が弾性変形することで、係止部44e2が支持部44dから遠ざかる方向に移動することができるようになっている。   Further, the developing device frame 44 is provided with a locking plate 44e as a phasing portion capable of elastic deformation near the support portion 44d. The structure of the locking plate 44e is substantially the same as that described in the sixth embodiment. That is, the locking plate 44e includes an arm-shaped base 44e1 extending from the non-driving side end surface 44a of the developing device frame 44 to the outside in the longitudinal direction of the developing device 4, and a locking provided near the tip of the base 44e1. Part 44e2. The base portion 44e1 of the locking plate 44e is provided obliquely above the support portion 44d, and the locking portion 44e2 of the locking plate 44e is directed toward the central axis of the support portion 44d obliquely below and in the longitudinal direction of the developing device 4. It extends along. The locking plate 44e can move in a direction in which the locking portion 44e2 moves away from the support portion 44d when the base portion 44e1 is elastically deformed.

又、本実施例では、離間部材48は、現像装置4の長手方向に所定の厚さを有する円環状部48aを有する。又、離間部材48は、円環状部48aからその半径方向外側に突出した当接部48bを有する。本実施例では、円環状部48a、当接部48bは、現像装置4の長手方向において略同一の所定の厚さを有し、該長手方向の両側面は略面一とされている。ただし、本実施例では、当接部48bの先端は、現像装置4の長手方向に延長されている。更に、本実施例では、離間部材48は、円環状部48aの外周面に、被位相決め部としての第1の切り欠き48e、解除後被位相決め部としての第2の切り欠き48fが設けられている。第1、第2の切り欠き48e、48fは、現像装置4の長手方向に沿って延びる溝状に形成されている。離間部材48は、現像枠体44の支持部44eが円環状部48aの内径部48a1を嵌合することで、該支持部44eによって回転可能に支持される。   In this embodiment, the separating member 48 has an annular portion 48 a having a predetermined thickness in the longitudinal direction of the developing device 4. The spacing member 48 has an abutting portion 48b that protrudes radially outward from the annular portion 48a. In this embodiment, the annular portion 48a and the contact portion 48b have substantially the same predetermined thickness in the longitudinal direction of the developing device 4, and both side surfaces in the longitudinal direction are substantially flush. However, in this embodiment, the tip of the contact portion 48 b is extended in the longitudinal direction of the developing device 4. Furthermore, in the present embodiment, the separating member 48 is provided with a first notch 48e as a phased portion and a second notch 48f as a phased portion after release on the outer peripheral surface of the annular portion 48a. It has been. The first and second cutouts 48 e and 48 f are formed in a groove shape extending along the longitudinal direction of the developing device 4. The spacing member 48 is rotatably supported by the support portion 44e when the support portion 44e of the developing device frame 44 is engaged with the inner diameter portion 48a1 of the annular portion 48a.

そして、離間部材48は、非駆動側軸受部材46が現像枠体44に取り付けられると、現像枠体44の支持部44dが非駆動側軸受部材46の支持穴46hに嵌合することで、支持部44eから脱落することなく取り付けられる。   When the non-driving side bearing member 46 is attached to the developing device frame 44, the separation member 48 is supported by the support portion 44d of the developing device frame 44 being fitted into the supporting hole 46h of the non-driving side bearing member 46. It is attached without falling off from the portion 44e.

図25は、離間部材48が現像ローラ41を感光体ドラム1から離間させている状態から、離間部材48による離間状態が解除されて現像ローラ41と感光体ドラム1とが当接した状態になるまでの動作を説明するための側面図である。図25では、非駆動側カバー部材125、非駆動側軸受部材46は省略した。尚、本実施例では、実施例3で説明したように、離間部材48が、感光体ドラム1の非駆動側端部部材1bに形成された離間解除部1cによって回転させられる構成が採用されている。   In FIG. 25, the separation member 48 is released from the state where the developing roller 41 is separated from the photosensitive drum 1, and the separation state by the separation member 48 is released and the developing roller 41 and the photosensitive drum 1 are in contact with each other. It is a side view for demonstrating the operation | movement until. In FIG. 25, the non-driving side cover member 125 and the non-driving side bearing member 46 are omitted. In this embodiment, as described in the third embodiment, a configuration is adopted in which the separation member 48 is rotated by the separation release portion 1c formed on the non-driving side end member 1b of the photosensitive drum 1. Yes.

図25(a)は、離間部材48によって現像ローラ41が感光体ドラム1から離間させられている状態を示している。この状態で、係止板44eの係止部44e2は、離間部材48の第1の切り欠き48eと噛み合って、離間部材48の位相を決める。   FIG. 25A shows a state in which the developing roller 41 is separated from the photosensitive drum 1 by the separation member 48. In this state, the locking portion 44e2 of the locking plate 44e meshes with the first notch 48e of the spacing member 48 to determine the phase of the spacing member 48.

ここで、現像枠体44の支持部44dに取り付けられた離間部材48は、支持部44dを支点として回転可能に支持されている。離間部材48の当接部48bは、支持部44eと感光体ドラム1の回転軸線B2との間にある。実施例1と同様に、このような配置とすることにより、離間部材48の現像ローラ41と感光体ドラム1との離間状態を維持するための強度を高くし、部品の小型化を図ることができる。   Here, the separation member 48 attached to the support portion 44d of the developing device frame 44 is rotatably supported using the support portion 44d as a fulcrum. The contact portion 48 b of the separation member 48 is between the support portion 44 e and the rotation axis B <b> 2 of the photosensitive drum 1. Similar to the first embodiment, such an arrangement can increase the strength of the separation member 48 to maintain the separation state between the developing roller 41 and the photosensitive drum 1 and reduce the size of the components. it can.

図25(b)は、離間部材48による現像ローラ41と感光体ドラム1との離間状態が解除された状態を示している。感光体ドラム1の回転と同時に感光体ドラム1の非駆動側端部部材1bの離間解除部1cが図中矢印R1方向に回転する。これにより、離間解除部1cは、離間部材48を図中矢印A3方向に回転させて、離間部材48による現像ローラ41と感光体ドラム1との離間状態が解除される。この状態で、係止板44eの係止部44e2は、離間部材48の第2の切り欠き48fと噛み合って、離間部材48の位相を決める。   FIG. 25B shows a state where the separated state between the developing roller 41 and the photosensitive drum 1 by the separating member 48 is released. Simultaneously with the rotation of the photosensitive drum 1, the separation releasing portion 1c of the non-driving side end member 1b of the photosensitive drum 1 rotates in the direction of arrow R1 in the drawing. As a result, the separation releasing portion 1c rotates the separation member 48 in the direction of the arrow A3 in the drawing, and the separation state between the developing roller 41 and the photosensitive drum 1 by the separation member 48 is released. In this state, the locking portion 44e2 of the locking plate 44e meshes with the second notch 48f of the spacing member 48 to determine the phase of the spacing member 48.

本実施例では、係止板44eと離間部材48の第1の切り欠き48eとによって、現像ローラ41と感光体ドラム1とを離間させる第1の位相に離間部材48を位相決めする位相決め手段が構成される。又、本実施例では、係止板44eと第2の切り欠き48fとによって、解除後位相決め手段が構成される。この解除後位相決め手段は、離間部材48による現像ローラ41と感光体ドラム1との離間状態を解除した後に、離間部材48を感光体ドラム1と接触しない待避した第2の位相に位相決めする。   In this embodiment, the phase determining means for phasing the separating member 48 to the first phase for separating the developing roller 41 and the photosensitive drum 1 by the locking plate 44e and the first notch 48e of the separating member 48. Is configured. In this embodiment, the post-release phase determining means is constituted by the locking plate 44e and the second notch 48f. The post-release phase determining means releases the separation state between the developing roller 41 and the photosensitive drum 1 by the separation member 48 and then sets the separation member 48 to the second phase that is retracted so as not to contact the photosensitive drum 1. .

このように、本実施例では、離間部材48は更に、解除後被位相決め部としての第2の切り欠き48fを有する。第2の切り欠き48fは、当接部48bの感光体1又は端部部材1bへの当接状態が解除された後に、位相決め部としての係止板44eの作用を受けて当接部48bが感光体1に接触しない位置に離間部材48の回転方向の位置を決める。本実施例では、被位相決め部としての第1の切り欠き48eは、上記当接状態が解除される際の離間部材48の回転方向において、第2の切り欠き48fよりも下流にある。   As described above, in this embodiment, the separation member 48 further includes the second notch 48f as the post-release phased portion. The second notch 48f receives the action of the locking plate 44e as the phase determining portion after the contact state of the contact portion 48b with the photosensitive member 1 or the end member 1b is released, and then the contact portion 48b. Determines the position of the separating member 48 in the rotational direction so that it does not contact the photosensitive member 1. In the present embodiment, the first notch 48e as the phase-determining portion is downstream of the second notch 48f in the rotation direction of the separating member 48 when the contact state is released.

以上、本実施例の構成によっても、実施例1、2と同様の効果を得ることができる。又、本実施例では、離間部材の位相決め手段の構成を比較的簡易とすることができる。又、実施例4と同様に、離間部材48による現像ローラ41と感光体ドラム1との離間状態が解除された後における、離間部材48と感光体ドラム1との接触をより確実に回避することができる。   As described above, the same effects as those of the first and second embodiments can be obtained by the configuration of the present embodiment. In the present embodiment, the configuration of the phasing means for the separating member can be made relatively simple. Further, as in the fourth embodiment, the contact between the separation member 48 and the photosensitive drum 1 after the separation state between the developing roller 41 and the photosensitive drum 1 by the separation member 48 is released can be avoided more reliably. Can do.

その他の実施例
以上、本発明を具体的な実施例に則して説明したが、本発明は上述の実施例に限定されるものではない。
Other Embodiments Although the present invention has been described based on the specific embodiments, the present invention is not limited to the above-described embodiments.

例えば、上記各本実施例では、離間部材が順回転方向へ回転し過ぎないようにする順回転規制部を現像枠体に設けたが、この順回転規制部は、例えば非駆動側軸受部材に設けてもよい。   For example, in each of the above-described embodiments, a forward rotation restricting portion that prevents the separation member from excessively rotating in the forward rotation direction is provided in the developing frame, but the forward rotation restricting portion is provided, for example, on the non-drive side bearing member. It may be provided.

又、実施例2、4では、離間部材の一部に弾性変形部分を設けたが、実施例6、7で説明したように、例えば非駆動側軸受部材や現像枠体に弾性変形部分を設けてもよい。   In the second and fourth embodiments, the elastic deformation portion is provided on a part of the separation member. However, as described in the sixth and seventh embodiments, for example, the non-drive side bearing member and the developing frame are provided with the elastic deformation portion. May be.

又、上記各実施例では、離間部材は、支持受け部としての円環状部の内径部に、支持枠体(現像枠体、軸受部材など)に設けられた軸部材(現像ローラの芯材、円柱若しくは円筒形状の支持部など)に嵌合することで、回転可能に支持した。しかし、これに限定されるものではなく、例えば図26に示すように、離間部材48に支持受け部として軸部48gを設け、支持枠体に軸受けとしての穴46fを設け、これらを嵌合することで、離間部材48を回転可能に支持してもよい。   Further, in each of the above embodiments, the separation member is a shaft member (developing roller core material, development roller body, bearing member, etc.) provided on the inner diameter portion of the annular portion serving as the support receiving portion. It was supported so as to be rotatable by being fitted to a columnar or cylindrical support portion. However, the present invention is not limited to this. For example, as shown in FIG. 26, a shaft portion 48g is provided as a support receiving portion in the spacing member 48, a hole 46f is provided as a bearing in the support frame, and these are fitted. Thus, the separation member 48 may be rotatably supported.

又、上記各実施例では、電子写真画像形成装置として、4個のプロセスカートリッジが着脱可能なフルカラー電子写真画像形成装置を例示した。しかし、電子写真画像形成装置に装着するプロセスカートリッジの個数は、これに限定されるものではなく、必要に応じて適宜設定されるものである。例えば、モノクロの画像を形成する画像形成装置の場合には、電子写真画像形成装置に装着されるプロセスカートリッジの個数は1個である。   In each of the above-described embodiments, the electrophotographic image forming apparatus is exemplified by a full-color electrophotographic image forming apparatus in which four process cartridges can be attached and detached. However, the number of process cartridges to be mounted on the electrophotographic image forming apparatus is not limited to this, and can be set as needed. For example, in the case of an image forming apparatus that forms a monochrome image, the number of process cartridges attached to the electrophotographic image forming apparatus is one.

又、上記各実施例では、画像形成装置としてはプリンタを例示した。しかし、これに限定されるものではなく、例えば複写機、ファクシミリ装置などの他の画像形成装置や、或いはこれらの機能を組み合わせた複合機などの他の画像形成装置にも適用することができる。   In each of the above embodiments, a printer is exemplified as the image forming apparatus. However, the present invention is not limited to this. For example, the present invention can also be applied to other image forming apparatuses such as a copying machine and a facsimile machine, or other image forming apparatuses such as a multi-function machine combining these functions.

又、本発明は、上記各実施例のように、プロセスユニットがプロセスカートリッジなどとして画像形成装置の本体に対して容易に着脱して交換可能とされている態様に限定されるものではない。プロセスユニットが画像形成装置に搭載された状態で出荷される場合であっても、使用開始前の流通又は保管中などに不用意にプロセス手段が接触することを防止するなどのために、プロセス手段を使用中よりも感光体から離して出荷することが行われることがある。このように、プロセスユニットが画像形成装置に搭載された状態で、プロセス手段を使用中よりも感光体から離す構成となっている場合も、本発明を等しく適用することができ、上記同様の効果を奏することができる。   Further, the present invention is not limited to an embodiment in which the process unit is easily attached to and detached from the main body of the image forming apparatus as a process cartridge or the like as in the above embodiments. Even when the process unit is shipped in the state of being mounted on the image forming apparatus, in order to prevent the process unit from inadvertently contacting during distribution or storage before starting use, the process unit In some cases, the product is shipped away from the photoconductor than in use. As described above, the present invention can be equally applied to the case where the process unit is mounted on the image forming apparatus and the process unit is separated from the photoreceptor rather than being used. Can be played.

又、使用開始前の流通又は保管中などに使用中よりも感光体から離した状態を維持することが望まれるプロセス手段は、上記各実施例におけるような現像剤担持体に限定されるものではない。例えば、一般に、使用中に感光体に接触させられる帯電手段としての帯電ローラ、クリーニング手段としてのクリーニングブレードは、ゴム材料などの弾性材料で形成される。そして、このような帯電ローラやクリーニングブレードが、使用開始前の流通又は保管中に感光体に当接されたままにされると、変形したり、そこからしみ出した物質によって感光体に悪影響を及ぼすことがあり得る。従って、これらの現像剤担持体以外のプロセス手段を、使用開始前の流通又は保管中などに使用中よりも感光体から離された状態に維持することが望まれることがある。本発明は、このように現像剤担持体以外のプロセス手段に対しても等しく適用し得るものであり、上記同様の効果を奏することができる。例えば、図27に示すように、上記各実施例の現像枠体44の場合と同様に、帯電ローラ2、クリーニングブレード61を支持する支持枠体としてのクリーニング容器62を、図中矢印A7、A8方向に回動可能に、例えば現像枠体44に取り付けることができる。そして、使用開始前の流通又は保管中などには、帯電ローラ2の回転軸(芯材)やクリーニング容器62の支持部に回転可能に取り付けられた離間部材48によって、感光体ドラム1から帯電ローラ2、更にはクリーニングブレード61を離間させることができる。そして、この離間部材の位相決め手段に関して、上記各実施例と同様のものを適用することができ、上記各実施例と同様の効果を得ることができる。   Further, the process means that is desired to be kept away from the photoreceptor more than in use during distribution or storage before the start of use is not limited to the developer carrier as in the above embodiments. Absent. For example, in general, a charging roller as a charging unit brought into contact with a photosensitive member during use and a cleaning blade as a cleaning unit are formed of an elastic material such as a rubber material. If such a charging roller or cleaning blade is left in contact with the photosensitive member during distribution or storage before the start of use, the photosensitive member may be adversely affected by deformation or a material exuded therefrom. Can be affected. Therefore, it may be desirable to maintain the process means other than the developer carrier in a state of being separated from the photoconductor than in use during distribution or storage before the start of use. The present invention can be equally applied to process means other than the developer carrier as described above, and can provide the same effects as described above. For example, as shown in FIG. 27, as in the case of the developing frame 44 in each of the above embodiments, a cleaning container 62 as a support frame that supports the charging roller 2 and the cleaning blade 61 is shown by arrows A7 and A8 in the drawing. For example, it can be attached to the developing device frame 44 so as to be rotatable in the direction. Then, during distribution or storage before the start of use, the charging roller is separated from the photosensitive drum 1 by the separation member 48 rotatably attached to the rotating shaft (core material) of the charging roller 2 or the support portion of the cleaning container 62. 2 and further, the cleaning blade 61 can be separated. And the same thing as said each Example can be applied regarding the phase determination means of this separation member, and the same effect as said each Example can be acquired.

又、上記各実施例では、感光体とプロセス手段とを使用中よりも離された状態にする規制部材は、使用中には感光体に接触させられるプロセス手段を、使用開始前の流通又は保管中などに感光体から離間させる離間部材であるものとして説明した。しかし、前述のように、使用中に感光体に接触しないプロセス手段であっても、使用開始前の流通又は保管中などに不用意に感光体に接触することを防止するなどのために、これを使用中よりも感光体から離して出荷することが望まれることがある。本発明は、このような場合にも等しく適用することができ、使用開始前の流通又は保管中などにプロセス手段が不用意に感光体に接触することを防止することの他、上記各実施例と同様の効果を得ることができる。   In each of the above embodiments, the regulating member that separates the photoconductor and the process means from that in use is provided with a process means that is brought into contact with the photoconductor during use. The description has been made assuming that the member is a separating member that is separated from the photosensitive member inside. However, as described above, even if the process means does not come into contact with the photoreceptor during use, in order to prevent inadvertent contact with the photoreceptor during distribution or storage before use, etc. It may be desirable to ship the product away from the photoreceptor rather than in use. The present invention can be equally applied to such a case. In addition to preventing the process means from inadvertently contacting the photoconductor during distribution or storage before the start of use, each of the above embodiments. The same effect can be obtained.

1 感光体ドラム
4 現像装置
41 現像ローラ
41a 芯材(支持部)
44 現像枠体
44e 係止板(位相決め部)
46 非駆動側軸受部材
46d 位相決め部
46g 係止板(位相決め部)
48 離間部材(規制部材)
48a 円環状部(支持受け部)
48b 当接部
48c 被位相決め部
48d 切り欠き(被位相決め部)
48e 第1の切り欠き(第1の被位相決め部)
48f 第2の切り欠き(第2の被位相決め部)
50L 非駆動側供給ローラ軸シール(位相決め部)
100 画像形成装置
110 装置本体
120 プロセスカートリッジ
DESCRIPTION OF SYMBOLS 1 Photosensitive drum 4 Developing apparatus 41 Developing roller 41a Core material (support part)
44 Development frame 44e Locking plate (phase determining portion)
46 Non-driving side bearing member 46d Phase determining portion 46g Locking plate (phase determining portion)
48 Spacing member (regulating member)
48a Annular part (support receiving part)
48b Contact portion 48c Phased portion 48d Notch (phased portion)
48e First cutout (first phased portion)
48f Second notch (second phased portion)
50L Non-driving side supply roller shaft seal (phase determining part)
DESCRIPTION OF SYMBOLS 100 Image forming apparatus 110 Apparatus main body 120 Process cartridge

Claims (14)

回転可能な感光体に作用するプロセス手段と、前記プロセス手段を支持する支持枠体と、を有し、前記プロセス手段が、使用中の第1の位置と、使用中よりも前記感光体の表面から離された第2の位置と、をとり得るプロセスユニットにおいて、
前記プロセス手段を前記第2の位置に維持し得る規制部材と、
前記規制部材を回転可能に支持する支持部と、
前記規制部材に作用して、前記規制部材の回転方向の位置を、前記規制部材が前記プロセス手段を前記第2の位置に維持し得る位置に決める位相決め部と、
を有し、
前記規制部材は、前記支持部によって回転可能に支持される支持受け部と、前記プロセス手段を前記第2の位置に維持する際に前記感光体又は前記感光体の回転軸線方向の端部に設けられた端部部材に当接する当接部と、前記位相決め部の作用を受ける被位相決め部と、を有し、前記感光体が回転することにより、前記位相決め部が前記規制部材の回転方向の位置を決める力に抗して、前記当接部の前記感光体又は前記端部部材への当接状態が解除されて、前記プロセス手段が前記第1の位置になることを特徴とするプロセスユニット。
A process means acting on a rotatable photoconductor; and a support frame that supports the process means, wherein the process means has a first position in use and a surface of the photoconductor that is more in use than in use. In a process unit capable of taking a second position separated from
A regulating member capable of maintaining the process means in the second position;
A support portion for rotatably supporting the regulating member;
A phasing unit that acts on the regulating member to determine a position of the regulating member in a rotation direction at a position where the regulating member can maintain the process means at the second position;
Have
The restricting member is provided at a support receiving portion that is rotatably supported by the support portion, and at an end portion in the rotation axis direction of the photoconductor or the photoconductor when the process means is maintained at the second position. And a phased portion that receives the action of the phase determining unit. When the photosensitive member rotates, the phase determining unit rotates the regulating member. The contact state of the contact portion with the photosensitive member or the end member is released against a force that determines a position in the direction, and the process means is in the first position. Process unit.
前記位相決め部及び前記被位相決め部のうちの一方は、前記当接状態が解除される方向に前記規制部材が回転する際に、前記位相決め部の前記被位相決め部への作用が解除される方向に前記位相決め部及び前記被位相決め部のうちの他方によって弾性変形させられる弾性変形部を有することを特徴とする請求項1に記載のプロセスユニット。   One of the phase determining unit and the phased determining unit cancels the action of the phase determining unit on the phased determining unit when the restricting member rotates in a direction in which the contact state is released. The process unit according to claim 1, further comprising an elastically deformable portion that is elastically deformed by the other of the phasing portion and the phase-determined portion in a direction to be moved. 前記位相決め部及び前記被位相決め部のうちの前記他方は、前記当接状態が解除される際とは逆方向に前記規制部材が回転することを規制する逆回転規制部を有することを特徴とする請求項2に記載のプロセスユニット。   The other of the phasing portion and the phased portion includes a reverse rotation restricting portion that restricts rotation of the restricting member in a direction opposite to that when the contact state is released. The process unit according to claim 2. 更に、前記当接状態が解除された後に、前記規制部材に作用して、前記規制部材の回転方向の位置を、前記当接部が前記感光体に接触しない位置に決める解除後位相決め部を有することを特徴とする請求項1に記載のプロセスユニット。   Furthermore, after the contact state is released, a post-release phase determining unit that acts on the restricting member to determine the position of the restricting member in the rotation direction at a position where the contact portion does not contact the photoconductor. The process unit according to claim 1, comprising: 更に、前記当接状態が解除された後に、前記規制部材に作用して、前記規制部材の回転方向の位置を、前記当接部が前記感光体に接触しない位置に決める解除後位相決め部を有し、前記解除後位相決め部は、前記弾性変形部の反発力を受けて、前記当接状態が解除される際の回転方向に前記規制部材を回転させる部位を有することを特徴とする請求項2又は3に記載のプロセスユニット。   Furthermore, after the contact state is released, a post-release phase determining unit that acts on the restricting member to determine the position of the restricting member in the rotation direction at a position where the contact portion does not contact the photoconductor. And the post-cancel phasing portion includes a portion that receives a repulsive force of the elastic deformation portion and rotates the restricting member in a rotation direction when the contact state is released. Item 4. The process unit according to Item 2 or 3. 前記位相決め部は、前記当接状態が解除される際の前記規制部材の回転方向において、前記解除後位相決め部よりも上流にあることを特徴とする請求項4又は5に記載のプロセスユニット。   6. The process unit according to claim 4, wherein the phase determining unit is upstream of the post-cancel phase determining unit in a rotation direction of the restricting member when the contact state is cancelled. . 前記規制部材は更に、前記当接状態が解除された後に、前記位相決め部の作用を受けて前記当接部が前記感光体に接触しない位置に前記規制部材の回転方向の位置を決める解除後被位相決め部を有することを特徴とする請求項1に記載のプロセスユニット。   After the release of the regulating member, after the abutting state is released, the position of the regulating member in the rotational direction is determined so that the abutting portion does not contact the photoconductor due to the action of the phase determining unit. The process unit according to claim 1, further comprising a phased portion. 前記被位相決め部は、前記当接状態が解除される際の前記規制部材の回転方向において、前記解除後被位相決め部よりも下流にあることを特徴とする請求項7に記載のプロセスユニット。   The process unit according to claim 7, wherein the phase-determining portion is downstream of the post-release phase-determining portion in the rotation direction of the restricting member when the contact state is released. . 前記当接部は、前記端部部材に当接し、前記端部部材は、前記当接状態を解除する際に前記当接部と係合して前記規制部材を回転させる係合部を有することを特徴とする請求項1〜8のいずれか一項に記載のプロセスユニット。   The abutting portion abuts on the end member, and the end member has an engaging portion that engages with the abutting portion and rotates the regulating member when releasing the abutting state. The process unit according to claim 1, wherein: 前記当接部は、前記感光体の回転軸線と、前記規制部材の回転軸線との間にあることを特徴とする請求項1〜9のいずれか一項に記載のプロセスユニット。   The process unit according to claim 1, wherein the contact portion is between a rotation axis of the photoconductor and a rotation axis of the restricting member. 更に、前記当接状態が解除された後に、前記当接状態が解除される際の方向に前記規制部材が回転することを規制する順回転規制部を有することを特徴とする請求項1〜10のいずれか一項に記載のプロセスユニット。   Furthermore, it has a forward rotation control part which controls that the said control member rotates in the direction at the time of the said contact state being cancelled | released after the said contact state is cancelled | released. The process unit according to any one of the above. 請求項1〜11のいずれか一項に記載のプロセスユニットを有し、前記プロセス手段が感光体にトナーを供給する現像剤担持体である現像装置。   A developing device comprising the process unit according to claim 1, wherein the process means is a developer carrying member that supplies toner to a photosensitive member. 感光体と、請求項1〜11のいずれか一項に記載のプロセスユニットと、を有し、記録媒体に画像を形成して出力する画像形成装置の本体に対して着脱可能なプロセスカートリッジ。   A process cartridge that includes a photoconductor and the process unit according to claim 1, and is detachable from a main body of an image forming apparatus that forms and outputs an image on a recording medium. 感光体と、請求項1〜11のいずれか一項に記載のプロセスユニットと、を有し、記録媒体に画像を形成して出力する画像形成装置。   An image forming apparatus comprising a photoconductor and the process unit according to claim 1, and forming and outputting an image on a recording medium.
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